1966 United States House of Representatives elections

The 1966 United States House of Representatives elections was an election for the United States House of Representatives on November 8, 1966, to elect members to serve in the 90th United States Congress. They occurred in the middle of President Lyndon B. Johnson's second term. As the Vietnam War continued to escalate and race riots exploded in cities across the country, Johnson's popularity had fallen, and the opposition Republican Party was able to gain a net of 47 seats from Johnson's Democratic Party, which nonetheless maintained a clear majority in the House. This was also the first election thatoccurred after the Voting Rights Act of 1965 became law, the first time since 1870 that a Republican won a House seat in Arkansas, and the first since 1876 that the party did so in South Carolina (after the same in a 1965 special election for the seat).

Republican gains

• Alaska's at-large congressional district: four-term Democratic incumbent Ralph Rivers was defeated by Republican State Senator Howard Pollock.
• Arizona's 3rd congressional district: sophomore Democrat George F. Senner Jr. was defeated by state legislator Sam Steiger.
• Arkansas's 3rd congressional district: lumber executive and Arkansas GOP chair John Paul Hammerschmidt defeated incumbent James William Trimble, becoming the first Republican member of Arkansas' congressional delegation since Reconstruction.
• California's 18th congressional district: onetime Olympic gold medalist Bob Mathias defeated seven-term Democratic incumbent Harlan Hagen.
• California's 25th congressional district: Charles E. Wiggins defeated incumbent Democrat Ronald B. Cameron.
• California's 33rd congressional district: Jerry Pettis defeated incumbent Kenneth W. Dyal.
• Michigan's 2nd congressional district: Marvin Esch defeated incumbent Democrat Weston E. Vivian.
• Michigan's 3rd congressional district: Garry E. Brown defeated incumbent Democrat Paul H. Todd Jr..
• Michigan's 7th congressional district: Donald Riegle defeated incumbent Democrat John C. Mackie.
• Michigan's 11th congressional district: Phillip Ruppe defeated incumbent Democrat Raymond Clevenger.
• Michigan's 19th congressional district: Jack H. McDonald defeated incumbent Democrat Billie S. Farnum.
• Texas's 7th congressional district: businessman and 1964 U.S. Senate candidate George H. W. Bush defeated Democratic challenger Frank Briscoe for the seat vacated by John Dowdy (whose district had been renumbered the second).
• Texas's 18th congressional district: Bob Price succeeded retiring Democrat Walter E. Rogers by defeating Dee Miller.

Special elections

Elections are listed by date and district.

|- ! | Herbert Covington Bonner | | Democratic | 1940 | | Incumbent died November 7, 1965.<br/>New member elected February 5, 1966.<br/>Democratic hold; winner was later re-elected. | nowrap |

|- ! | John Lindsay | | Republican | 1958 | | Incumbent resigned December 31, 1965 to become Mayor of New York City.<br/>New member elected February 8, 1966.<br/>Republican hold; winner was later re-elected. | nowrap |

|- ! | Albert Thomas | | Democratic | 1936 | | Incumbent died February 15, 1966.<br/>New member elected March 26, 1966.<br/>Democratic hold; winner did not seek re-election. | nowrap |

|- ! | John F. Baldwin Jr. | | Republican | 1954 | | Incumbent died March 9, 1966.<br/>New member elected June 7, 1966.<br/>Democratic gain; winner was later re-elected. | nowrap |

Overall results

411 incumbent members sought reelection, but 8 were defeated in primaries and 41 defeated in the general election for a total of 362 incumbents winning.

Source: Election Statistics – Office of the Clerk

¹ One vacancy due to refusal of House to seat Adam Clayton Powell Jr. (D-New York)

Alabama

|- ! | Jack Edwards | | Republican | 1964 | Incumbent re-elected. | nowrap |

|- ! | William L. Dickinson | | Republican | 1964 | Incumbent re-elected. | nowrap |

|- ! | George W. Andrews | | Democratic | 1944 | Incumbent re-elected. | nowrap |

|- ! | Glenn Andrews | | Republican | 1964 | | Incumbent lost re-election.<br/>Democratic gain. | nowrap |

|- ! | Armistead I. Selden Jr. | | Democratic | 1952 | Incumbent re-elected. | nowrap |

|- ! | John H. Buchanan Jr. | | Republican | 1964 | Incumbent re-elected. | nowrap |

|- ! | James D. Martin | | Republican | 1964 | | Incumbent retired to run for Governor of Alabama.<br/>Democratic gain. | nowrap |

|- ! | Robert E. Jones Jr. | | Democratic | 1947 | Incumbent re-elected. | nowrap |

Alaska

|- ! | Ralph Rivers | | Democratic | 1958 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

Arizona

|- ! | John Jacob Rhodes | | Republican | 1952 | Incumbent re-elected. | nowrap |

|- ! | Mo Udall | | Democratic | 1961 | Incumbent re-elected. | nowrap |

|- ! | George F. Senner Jr. | | Democratic | 1962 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

Arkansas

|- ! | Ezekiel C. Gathings | | Democratic | 1938 | Incumbent re-elected. | nowrap |

|- ! | Wilbur Mills | | Democratic | 1938 | Incumbent re-elected. | nowrap |

|- ! | James William Trimble | | Democratic | 1944 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

|- ! | Oren Harris | | Democratic | 1940 | | Incumbent resigned to become district judge.<br/>Democratic hold. | nowrap |

California

|- ! | Don Clausen | | Republican | 1963 | Incumbent re-elected. | nowrap |

|- ! | Bizz Johnson | | Democratic | 1958 | Incumbent re-elected. | nowrap |

|- ! | John E. Moss | | Democratic | 1952 | Incumbent re-elected. | nowrap |

|- ! | Robert Leggett | | Democratic | 1962 | Incumbent re-elected. | nowrap |

|- ! | Phillip Burton | | Democratic | 1964 | Incumbent re-elected. | nowrap |

|- ! | William S. Mailliard | | Republican | 1952 | Incumbent re-elected. | nowrap |

|- ! | Jeffery Cohelan | | Democratic | 1958 | Incumbent re-elected. | nowrap |

|- ! | George P. Miller | | Democratic | 1944 | Incumbent re-elected. | nowrap |

|- ! | Don Edwards | | Democratic | 1962 | Incumbent re-elected. | nowrap |

|- ! | Charles Gubser | | Republican | 1952 | Incumbent re-elected. | nowrap |

|- ! | J. Arthur Younger | | Republican | 1952 | Incumbent re-elected. | nowrap |

|- ! | Burt Talcott | | Republican | 1962 | Incumbent re-elected. | nowrap |

|- ! | Charles M. Teague | | Republican | 1954 | Incumbent re-elected. | nowrap |

|- ! | Jerome Waldie | | Democratic | 1966 | Incumbent re-elected. | nowrap |

|- ! | John J. McFall | | Democratic | 1956 | Incumbent re-elected. | nowrap |

|- ! | B. F. Sisk | | Democratic | 1954 | Incumbent re-elected. | nowrap |

|- ! | Cecil R. King | | Democratic | 1942 | Incumbent re-elected. | nowrap |

|- ! | Harlan Hagen | | Democratic | 1952 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

|- ! | Chet Holifield | | Democratic | 1942 | Incumbent re-elected. | nowrap |

|- ! | H. Allen Smith | | Republican | 1956 | Incumbent re-elected. | nowrap |

|- ! | Augustus Hawkins | | Democratic | 1962 | Incumbent re-elected. | nowrap |

|- ! | James C. Corman | | Democratic | 1960 | Incumbent re-elected. | nowrap |

|- ! | Del M. Clawson | | Republican | 1963 | Incumbent re-elected. | nowrap |

|- ! | Glenard P. Lipscomb | | Republican | 1953 | Incumbent re-elected. | nowrap |

|- ! | Ronald B. Cameron | | Democratic | 1962 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

|- ! | Thomas M. Rees | | Democratic | 1965 | Incumbent re-elected. | nowrap |

|- ! | Edwin Reinecke | | Republican | 1964 | Incumbent re-elected. | nowrap |

|- ! | Alphonzo E. Bell Jr. | | Republican | 1960 | Incumbent re-elected. | nowrap |

|- ! | George Brown Jr. | | Democratic | 1962 | Incumbent re-elected. | nowrap |

|- ! | Edward R. Roybal | | Democratic | 1962 | Incumbent re-elected. | nowrap |

|- ! | Charles H. Wilson | | Democratic | 1962 | Incumbent re-elected. | nowrap |

|- ! | Craig Hosmer | | Republican | 1952 | Incumbent re-elected. | nowrap |

|- ! | Kenneth W. Dyal | | Democratic | 1964 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

|- ! | Richard T. Hanna | | Democratic | 1962 | Incumbent re-elected. | nowrap |

|- ! | James B. Utt | | Republican | 1952 | Incumbent re-elected. | nowrap |

|- ! | Bob Wilson | | Republican | 1952 | Incumbent re-elected. | nowrap |

|- ! | Lionel Van Deerlin | | Democratic | 1962 | Incumbent re-elected. | nowrap |

|- ! | John V. Tunney | | Democratic | 1964 | Incumbent re-elected. | nowrap |

Colorado

|- ! | Byron G. Rogers | | Democratic | 1950 | Incumbent re-elected. | nowrap |

|- ! | Roy H. McVicker | | Democratic | 1964 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

|- ! | Frank Evans | | Democratic | 1964 | Incumbent re-elected. | nowrap |

|- ! | Wayne N. Aspinall | | Democratic | 1948 | Incumbent re-elected. | nowrap |

Connecticut

|- ! | Emilio Q. Daddario | | Democratic | 1958 | Incumbent re-elected. | nowrap |

|- ! | William St. Onge | | Democratic | 1962 | Incumbent re-elected. | nowrap |

|- ! | Robert Giaimo | | Democratic | 1958 | Incumbent re-elected. | nowrap |

|- ! | Donald J. Irwin | | Democratic | 1958<br/>1960 <br/>1964 | Incumbent re-elected. | nowrap |

|- ! | John S. Monagan | | Democratic | 1958 | Incumbent re-elected. | nowrap |

|- ! | Bernard F. Grabowski | | Democratic | 1962 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

Delaware

|- ! | Harris McDowell | | Democratic | 1958 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

Florida

Florida redistricted to adjust for demographic changes; in addition to minor boundary changes a district was removed from northern Florida, and Broward County was broken out into its own district.

|- ! | Bob Sikes | | Democratic | 1940<br/>1944 <br/>1974 | Incumbent re-elected. | nowrap | Bob Sikes (Democratic) Unopposed

|- ! rowspan=2 | | Don Fuqua<br/> | | Democratic | 1962 | Incumbent re-elected. | rowspan=2 nowrap |

|- | D. R. Matthews<br/> | | Democratic | 1952 | | Incumbent lost renomination.<br/>Democratic loss.

|- ! | Charles E. Bennett<br/> | | Democratic | 1948 | Incumbent re-elected. | nowrap | Charles E. Bennett (Democratic) Unopposed

|- ! | Syd Herlong<br/> | | Democratic | 1948 | Incumbent re-elected. | nowrap | Syd Herlong (Democratic) Unopposed

|- ! | Edward Gurney<br/> | | Republican | 1962 | Incumbent re-elected. | nowrap | Edward Gurney (Republican) Unopposed

|- ! | Sam Gibbons<br/> | | Democratic | 1962 | Incumbent re-elected. | nowrap | Sam Gibbons (Democratic) Unopposed

|- ! | James A. Haley | | Democratic | 1952 | Incumbent re-elected. | nowrap |

|- ! | William C. Cramer<br/> | | Republican | 1954 | Incumbent re-elected. | nowrap |

|- ! | Paul Rogers<br/> | | Democratic | 1954 | Incumbent re-elected. | nowrap | Paul Rogers (Democratic) Unopposed

|- ! | colspan=3 | None (district created) | | New seat.<br/>Republican gain. | nowrap |

|- ! | Claude Pepper<br/> | | Democratic | 1962 | Incumbent re-elected. | nowrap | Claude Pepper (Democratic) Unopposed

|- ! | Dante Fascell<br/> | | Democratic | 1954 | Incumbent re-elected. | nowrap |

Georgia

|- ! | G. Elliott Hagan | | Democratic | 1960 | Incumbent re-elected. | nowrap |

|- ! | Maston E. O'Neal Jr. | | Democratic | 1964 | Incumbent re-elected. | nowrap | Maston E. O'Neal Jr. (Democratic) Unopposed

|- ! | Bo Callaway | | Republican | 1964 | | Incumbent retired to run for governor.<br/>Democratic gain. | nowrap |

|- ! | James MacKay | | Democratic | 1964 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

|- ! | Charles L. Weltner | | Democratic | 1962 | | Incumbent withdrew and was replaced on the ballot.<br/>Republican gain. | nowrap |

|- ! | John Flynt | | Democratic | 1954 | Incumbent re-elected. | nowrap |

|- ! | John William Davis | | Democratic | 1960 | Incumbent re-elected. | nowrap |

|- ! | J. Russell Tuten | | Democratic | 1962 | | Incumbent lost renomination.<br/>Democratic hold. | nowrap |

|- ! | Phillip M. Landrum | | Democratic | 1952 | Incumbent re-elected. | nowrap | Phillip M. Landrum (Democratic) Unopposed

|- ! | Robert Grier Stephens Jr. | | Democratic | 1960 | Incumbent re-elected. | nowrap |

Hawaii

|- ! rowspan=2 | | Spark Matsunaga | | Democratic | 1962 | Incumbent re-elected. | rowspan=2 nowrap |

|- | Patsy Mink | | Democratic | 1964 | Incumbent re-elected.

Idaho

|- ! | Compton I. White Jr. | | Democratic | 1962 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

|- ! | George V. Hansen | | Republican | 1964 | Incumbent re-elected. | nowrap |

Illinois

|- ! | William L. Dawson | | Democratic | 1942 | Incumbent re-elected. | nowrap |

|- ! | Barratt O'Hara | | Democratic | 1948<br/>1950 <br/>1952 | Incumbent re-elected. | nowrap |

|- ! | William T. Murphy | | Democratic | 1958 | Incumbent re-elected. | nowrap |

|- ! | Ed Derwinski | | Republican | 1958 | Incumbent re-elected. | nowrap |

|- ! | John C. Kluczynski | | Democratic | 1950 | Incumbent re-elected. | nowrap |

|- ! | Daniel J. Ronan | | Democratic | 1964 | Incumbent re-elected. | nowrap |

|- ! | Frank Annunzio | | Democratic | 1964 | Incumbent re-elected. | nowrap |

|- ! | Dan Rostenkowski | | Democratic | 1958 | Incumbent re-elected. | nowrap |

|- ! | Sidney R. Yates | | Democratic | 1948<br/>1962 <br/>1964 | Incumbent re-elected. | nowrap |

|- ! | Harold R. Collier | | Republican | 1956 | Incumbent re-elected. | nowrap |

|- ! | Roman Pucinski | | Democratic | 1958 | Incumbent re-elected. | nowrap |

|- ! | Robert McClory | | Republican | 1962 | Incumbent re-elected. | nowrap |

|- ! | Donald Rumsfeld | | Republican | 1962 | Incumbent re-elected. | nowrap |

|- ! | John N. Erlenborn | | Republican | 1964 | Incumbent re-elected. | nowrap |

|- ! | Charlotte Thompson Reid | | Republican | 1962 | Incumbent re-elected. | nowrap |

|- ! | John B. Anderson | | Republican | 1960 | Incumbent re-elected. | nowrap |

|- ! | Leslie C. Arends | | Republican | 1934 | Incumbent re-elected. | nowrap |

|- ! | Robert H. Michel | | Republican | 1956 | Incumbent re-elected. | nowrap |

|- ! | Gale Schisler | | Democratic | 1964 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

|- ! | Paul Findley | | Republican | 1960 | Incumbent re-elected. | nowrap |

|- ! | Kenneth J. Gray | | Democratic | 1954 | Incumbent re-elected. | nowrap |

|- ! | William L. Springer | | Republican | 1950 | Incumbent re-elected. | nowrap |

|- ! | George E. Shipley | | Democratic | 1958 | Incumbent re-elected. | nowrap |

|- ! | Melvin Price | | Democratic | 1944 | Incumbent re-elected. | nowrap |

Indiana

Indiana redistricted for this election, election boundary changes forced two Republican incumbents into the same district while creating a new district that was won by another Republican.

|- ! | Ray Madden | | Democratic | 1942 | Incumbent re-elected. | nowrap |

|- ! | Charles A. Halleck | | Republican | 1935 | Incumbent re-elected. | nowrap |

|- ! | John Brademas | | Democratic | 1958 | Incumbent re-elected. | nowrap |

|- ! | E. Ross Adair | | Republican | 1950 | Incumbent re-elected. | nowrap |

|- ! | J. Edward Roush | | Democratic | 1958 | Incumbent re-elected. | nowrap |

|- ! | William G. Bray<br/> | | Republican | 1950 | Incumbent re-elected. | nowrap |

|- ! | colspan=3 | None (district created) | | New seat.<br/>Republican gain. | nowrap |

|- ! | Winfield K. Denton | | Democratic | 1954 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

|- ! | Lee Hamilton | | Democratic | 1964 | Incumbent re-elected. | nowrap |

|- ! rowspan=2 | | Richard L. Roudebush<br/> | | Republican | 1960 | Incumbent re-elected. | rowspan=2 nowrap |

|- | Ralph Harvey | | Republican | 1960 | | Incumbent lost renomination.<br/>Republican loss.

|- ! | Andrew Jacobs Jr. | | Democratic | 1964 | Incumbent re-elected. | nowrap |

Iowa

|- ! | John R. Schmidhauser | | Democratic | 1964 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

|- ! | John Culver | | Democratic | 1964 | Incumbent re-elected. | nowrap |

|- ! | H. R. Gross | | Republican | 1948 | Incumbent re-elected. | nowrap |

|- ! | Bert Bandstra | | Democratic | 1964 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

|- ! | Neal Smith | | Democratic | 1958 | Incumbent re-elected. | nowrap |

|- ! | Stanley L. Greigg | | Democratic | 1964 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

|- ! | John R. Hansen | | Democratic | 1964 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

Kansas

|- ! | Bob Dole | | Republican | 1960 | Incumbent re-elected. | nowrap |

|- ! | Chester L. Mize | | Republican | 1964 | Incumbent re-elected. | nowrap |

|- ! | Robert Ellsworth | | Republican | 1960 | | Incumbent retired to run for U.S. senator.<br/>Republican hold. | nowrap |

|- ! | Garner E. Shriver | | Republican | 1960 | Incumbent re-elected. | nowrap |

|- ! | Joe Skubitz | | Republican | 1962 | Incumbent re-elected. | nowrap |

Kentucky

|- ! | Frank Stubblefield | | Democratic | 1958 | Incumbent re-elected. | nowrap |

|- ! | William Natcher | | Democratic | 1953 | Incumbent re-elected. | nowrap |

|- ! | Charles R. Farnsley | | Democratic | 1964 | | Incumbent retired.<br/>Republican gain. | nowrap |

|- ! | Frank Chelf | | Democratic | 1944 | | Incumbent retired, but replaced John Moloney on the ballot after he died 2 days before the election.<br/>Incumbent lost re-election.<br/>Republican gain. | nowrap |

|- ! | Tim Lee Carter | | Republican | 1964 | Incumbent re-elected. | nowrap |

|- ! | John C. Watts | | Democratic | 1951 | Incumbent re-elected. | nowrap |

|- ! | Carl D. Perkins | | Democratic | 1948 | Incumbent re-elected. | nowrap |

Louisiana

|- ! | F. Edward Hébert | | Democratic | 1940 | Incumbent re-elected. | nowrap |

|- ! | Hale Boggs | | Democratic | 1940<br/>1942 <br/>1946 | Incumbent re-elected. | nowrap |

|- ! | Edwin E. Willis | | Democratic | 1948 | Incumbent re-elected. | nowrap |

|- ! | Joe Waggonner | | Democratic | 1961 | Incumbent re-elected. | nowrap |

|- ! | Otto Passman | | Democratic | 1946 | Incumbent re-elected. | nowrap |

|- ! | James H. Morrison | | Democratic | 1942 | | Incumbent lost renomination.<br/>Democratic hold. | nowrap |

|- ! | Edwin Edwards | | Democratic | 1965 | Incumbent re-elected. | nowrap |

|- ! | Speedy Long | | Democratic | 1964 | Incumbent re-elected. | nowrap |

Maine

|- ! | Stanley R. Tupper | | Republican | 1960 | | Incumbent retired.<br/>Democratic gain. | nowrap |

|- ! | William Hathaway | | Democratic | 1964 | Incumbent re-elected. | nowrap |

Maryland

Maryland redistricted its at-large district into an 8th district around Montgomery County, managing to adjust boundaries so no existing incumbents were displaced.

|- ! | Rogers Morton | | Republican | 1962 | Incumbent re-elected. | nowrap |

|- ! | Clarence Long | | Democratic | 1962 | Incumbent re-elected. | nowrap |

|- ! | Edward Garmatz | | Democratic | 1947 | Incumbent re-elected. | nowrap | Edward Garmatz (Democratic) Unopposed

|- ! | George Hyde Fallon | | Democratic | 1944 | Incumbent re-elected. | nowrap |

|- ! | Hervey Machen | | Democratic | 1964 | Incumbent re-elected. | nowrap |

|- ! | Charles Mathias | | Republican | 1960 | Incumbent re-elected. | nowrap |

|- ! | Samuel Friedel | | Democratic | 1952 | Incumbent re-elected. | nowrap |

|- ! | Carlton R. Sickles<br/> | | Democratic | 1962 | | Incumbent retired to run for governor.<br/>Republican gain. | nowrap |

Massachusetts

|- ! | Silvio O. Conte | | Republican | 1958 | Incumbent re-elected. | nowrap | Silvio O. Conte (Republican) Unopposed

|- ! | Edward Boland | | Democratic | 1952 | Incumbent re-elected. | nowrap | Edward Boland (Democratic) Unopposed

|- ! | Philip J. Philbin | | Democratic | 1942 | Incumbent re-elected. | nowrap |

|- ! | Harold Donohue | | Democratic | 1946 | Incumbent re-elected. | nowrap | Harold Donohue (Democratic) Unopposed

|- ! | F. Bradford Morse | | Republican | 1960 | Incumbent re-elected. | nowrap |

|- ! | William H. Bates | | Republican | 1950 | Incumbent re-elected. | nowrap |

|- ! | Torbert Macdonald | | Democratic | 1954 | Incumbent re-elected. | nowrap |

|- ! | Tip O'Neill | | Democratic | 1952 | Incumbent re-elected. | nowrap | Tip O'Neill (Democratic) Unopposed

|- ! | John W. McCormack | | Democratic | 1928 | Incumbent re-elected. | nowrap | John W. McCormack (Democratic) Unopposed

|- ! | Joseph W. Martin Jr. | | Republican | 1924 | | Incumbent lost renomination.<br/>Republican hold. | nowrap |

|- ! | James A. Burke | | Democratic | 1958 | Incumbent re-elected. | nowrap |

|- ! | Hastings Keith | | Republican | 1958 | Incumbent re-elected. | nowrap |

Michigan

|- ! | John Conyers | | Democratic | 1964 | Incumbent re-elected. | nowrap |

|- ! | Weston E. Vivian | | Democratic | 1964 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

|- ! | Paul H. Todd Jr. | | Democratic | 1964 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

|- ! | J. Edward Hutchinson | | Republican | 1962 | Incumbent re-elected. | nowrap |

|- ! | Gerald Ford | | Republican | 1948 | Incumbent re-elected. | nowrap |

|- ! | Charles E. Chamberlain | | Republican | 1956 | Incumbent re-elected. | nowrap |

|- ! | John C. Mackie | | Democratic | 1964 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

|- ! | R. James Harvey | | Republican | 1960 | Incumbent re-elected. | nowrap |

|- ! | Robert P. Griffin | | Republican | 1956 | | Resigned to become U.S. senator.<br/>Republican hold. | nowrap |

|- ! | Al Cederberg | | Republican | 1952 | Incumbent re-elected. | nowrap |

|- ! | Raymond F. Clevenger | | Democratic | 1964 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

|- ! | James G. O'Hara | | Democratic | 1958 | Incumbent re-elected. | nowrap |

|- ! | Charles Diggs | | Democratic | 1954 | Incumbent re-elected. | nowrap |

|- ! | Lucien Nedzi | | Democratic | 1961 | Incumbent re-elected. | nowrap |

|- ! | William D. Ford | | Democratic | 1964 | Incumbent re-elected. | nowrap |

|- ! | John Dingell | | Democratic | 1955 | Incumbent re-elected. | nowrap |

|- ! | Martha Griffiths | | Democratic | 1954 | Incumbent re-elected. | nowrap |

|- ! | William Broomfield | | Republican | 1956 | Incumbent re-elected. | nowrap |

|- ! | Billie S. Farnum | | Democratic | 1964 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

Minnesota

|- ! | Al Quie | | Republican | 1958 | Incumbent re-elected. | nowrap |

|- ! | Ancher Nelsen | | Republican | 1958 | Incumbent re-elected. | nowrap |

|- ! | Clark MacGregor | | Republican | 1960 | Incumbent re-elected. | nowrap |

|- ! | Joseph Karth | | DFL | 1958 | Incumbent re-elected. | nowrap |

|- ! | Donald M. Fraser | | DFL | 1962 | Incumbent re-elected. | nowrap |

|- ! | Alec G. Olson | | DFL | 1962 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

|- ! | Odin Langen | | Republican | 1958 | Incumbent re-elected. | nowrap |

|- ! | John Blatnik | | DFL | 1946 | Incumbent re-elected. | nowrap | John Blatnik (DFL) Unopposed

Mississippi

|- ! | Thomas Abernethy | | Democratic | 1942 | Incumbent re-elected. | nowrap |

|- ! | Jamie Whitten | | Democratic | 1941 | Incumbent re-elected. | nowrap |

|- ! | John Bell Williams | | Democratic | 1946 | Incumbent re-elected. | nowrap |

|- ! | Prentiss Walker | | Republican | 1964 | | Incumbent retired to run for U.S. Senator.<br/>Democratic gain. | nowrap |

|- ! | William M. Colmer | | Democratic | 1932 | Incumbent re-elected. | nowrap |

Missouri

|- ! | Frank M. Karsten | | Democratic | 1946 | Incumbent re-elected. | nowrap |

|- ! | Thomas B. Curtis | | Republican | 1950 | Incumbent re-elected. | nowrap |

|- ! | Leonor Sullivan | | Democratic | 1952 | Incumbent re-elected. | nowrap |

|- ! | William J. Randall | | Democratic | 1959 | Incumbent re-elected. | nowrap |

|- ! | Richard W. Bolling | | Democratic | 1948 | Incumbent re-elected. | nowrap |

|- ! | William R. Hull Jr. | | Democratic | 1954 | Incumbent re-elected. | nowrap |

|- ! | Durward G. Hall | | Republican | 1960 | Incumbent re-elected. | nowrap |

|- ! | Richard H. Ichord Jr. | | Democratic | 1960 | Incumbent re-elected. | nowrap |

|- ! | William L. Hungate | | Democratic | 1964 | Incumbent re-elected. | nowrap |

|- ! | Paul C. Jones | | Democratic | 1948 | Incumbent re-elected. | nowrap |

Montana

|- ! | Arnold Olsen | | Democratic | 1960 | Incumbent re-elected. | nowrap |

|- ! | James F. Battin | | Republican | 1960 | Incumbent re-elected. | nowrap |

Nebraska

|- ! | Clair A. Callan | | Democratic | 1964 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

|- ! | Glenn Cunningham | | Republican | 1956 | Incumbent re-elected. | nowrap |

|- ! | David Martin | | Republican | 1960 | Incumbent re-elected. | nowrap |

Nevada

|- ! | Walter S. Baring Jr. | | Democratic | 1948<br/>1952 <br/>1956 | Incumbent re-elected. | nowrap |

New Hampshire

|- ! | J. Oliva Huot | | Democratic | 1964 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

|- ! | James Colgate Cleveland | | Republican | 1962 | Incumbent re-elected. | nowrap |

New Jersey

|- ! | colspan=3 | None (district created) | | New seat.<br/>Republican gain. | nowrap |

|- ! | Thomas C. McGrath Jr. | | Democratic | 1964 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

|- ! | James J. Howard | | Democratic | 1964 | Incumbent re-elected. | nowrap |

|- ! | Frank Thompson | | Democratic | 1954 | Incumbent re-elected. | nowrap |

|- ! | Peter Frelinghuysen Jr. | | Republican | 1952 | Incumbent re-elected. | nowrap |

|- ! | William T. Cahill<br/> | | Republican | 1958 | Incumbent re-elected. | nowrap |

|- ! | William B. Widnall | | Republican | 1950 | Incumbent re-elected. | nowrap |

|- ! | Charles S. Joelson | | Democratic | 1960 | Incumbent re-elected. | nowrap |

|- ! | Henry Helstoski | | Democratic | 1964 | Incumbent re-elected. | nowrap |

|- ! | Peter W. Rodino | | Democratic | 1948 | Incumbent re-elected. | nowrap |

|- ! | Joseph Minish | | Democratic | 1962 | Incumbent re-elected. | nowrap |

|- ! rowspan=2 | | Florence P. Dwyer<br/> | | Republican | 1956 | Incumbent re-elected. | rowspan=2 nowrap |

|- | Paul J. Krebs | | Democratic | 1964 | | Incumbent retired.<br/>Democratic loss.

|- ! | Neil Gallagher | | Democratic | 1958 | Incumbent re-elected. | nowrap |

|- ! | Dominick V. Daniels | | Democratic | 1958 | Incumbent re-elected. | nowrap |

|- ! | Edward J. Patten | | Democratic | 1962 | Incumbent re-elected. | nowrap |

New Mexico

|- ! rowspan=2 | | Thomas G. Morris | | Democratic | 1958 | Incumbent re-elected. | rowspan=2 nowrap |

|- | E. S. Johnny Walker | | Democratic | 1964 | Incumbent re-elected.

New York

|- ! | Otis G. Pike | | Democratic | 1960 | Incumbent re-elected. | nowrap |

|- ! | James R. Grover Jr. | | Republican | 1962 | Incumbent re-elected. | nowrap |

|- ! | Lester L. Wolff | | Democratic | 1964 | Incumbent re-elected. | nowrap |

|- ! | John W. Wydler | | Republican | 1962 | Incumbent re-elected. | nowrap |

|- ! | Herbert Tenzer | | Democratic | 1964 | Incumbent re-elected. | nowrap |

|- ! | Seymour Halpern | | Republican | 1958 | Incumbent re-elected. | nowrap |

|- ! | Joseph P. Addabbo | | Democratic | 1960 | Incumbent re-elected. | nowrap |

|- ! | Benjamin Rosenthal | | Democratic | 1962 | Incumbent re-elected. | nowrap |

|- ! | James J. Delaney | | Democratic | 1944<br/>1946 <br/>1948 | Incumbent re-elected. | nowrap |

|- ! | Emanuel Celler | | Democratic | 1922 | Incumbent re-elected. | nowrap |

|- ! | Eugene Keogh | | Democratic | 1936 | | Incumbent retired.<br/>Democratic hold. | nowrap |

|- ! | Edna F. Kelly | | Democratic | 1949 | Incumbent re-elected. | nowrap |

|- ! | Abraham J. Multer | | Democratic | 1947 | Incumbent re-elected. | nowrap |

|- ! | John J. Rooney | | Democratic | 1944 | Incumbent re-elected. | nowrap |

|- ! | Hugh Carey | | Democratic | 1960 | Incumbent re-elected. | nowrap |

|- ! | John M. Murphy | | Democratic | 1962 | Incumbent re-elected. | nowrap |

|- ! | Theodore R. Kupferman | | Republican | 1966 <small>(special)</small> | Incumbent re-elected. | nowrap |

|- ! | Adam Clayton Powell Jr. | | Democratic | 1944 | Incumbent re-elected. | nowrap |

|- ! | Leonard Farbstein | | Democratic | 1956 | Incumbent re-elected. | nowrap |

|- ! | William Fitts Ryan | | Democratic | 1960 | Incumbent re-elected. | nowrap |

|- ! | James H. Scheuer | | Democratic | 1964 | Incumbent re-elected. | nowrap |

|- ! | Jacob H. Gilbert | | Democratic | 1960 | Incumbent re-elected. | nowrap |

|- ! | Jonathan B. Bingham | | Democratic | 1964 | Incumbent re-elected. | nowrap |

|- ! | Paul A. Fino | | Republican | 1952 | Incumbent re-elected. | nowrap |

|- ! | Richard Ottinger | | Democratic | 1964 | Incumbent re-elected. | nowrap |

|- ! | Ogden R. Reid | | Republican | 1962 | Incumbent re-elected. | nowrap |

|- ! | John G. Dow | | Democratic | 1964 | Incumbent re-elected. | nowrap |

|- ! | Joseph Y. Resnick | | Democratic | 1964 | Incumbent re-elected. | nowrap |

|- ! | Leo W. O'Brien | | Democratic | 1952 | | Incumbent retired.<br/>Republican gain. | nowrap |

|- ! | Carleton J. King | | Republican | 1960 | Incumbent re-elected. | nowrap |

|- ! | Robert C. McEwen | | Republican | 1964 | Incumbent re-elected. | nowrap |

|- ! | Alexander Pirnie | | Republican | 1958 | Incumbent re-elected. | nowrap |

|- ! | Howard W. Robison | | Republican | 1958 | Incumbent re-elected. | nowrap |

|- ! | James M. Hanley | | Democratic | 1964 | Incumbent re-elected. | nowrap |

|- ! | Samuel S. Stratton | | Democratic | 1958 | Incumbent re-elected. | nowrap |

|- ! | Frank Horton | | Republican | 1962 | Incumbent re-elected. | nowrap |

|- ! | Barber Conable | | Republican | 1964 | Incumbent re-elected. | nowrap |

|- ! | Charles Goodell | | Republican | 1959 | Incumbent re-elected. | nowrap |

|- ! | Richard D. McCarthy | | Democratic | 1964 | Incumbent re-elected. | nowrap |

|- ! | Henry P. Smith III | | Republican | 1964 | Incumbent re-elected. | nowrap |

|- ! | Thaddeus J. Dulski | | Democratic | 1958 | Incumbent re-elected. | nowrap |

North Carolina

|- ! | Walter B. Jones Sr. | | Democratic | 1966 <small>(special)</small> | Incumbent re-elected. | nowrap |

|- ! | Lawrence H. Fountain | | Democratic | 1952 | Incumbent re-elected. | nowrap |

|- ! | David N. Henderson | | Democratic | 1960 | Incumbent re-elected. | nowrap | David N. Henderson (Democratic) Unopposed

|- ! | Harold D. Cooley | | Democratic | 1934 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

|- ! | Ralph James Scott | | Democratic | 1956 | | Incumbent retired.<br/>Democratic hold. | nowrap |

|- ! | Horace R. Kornegay | | Democratic | 1960 | Incumbent re-elected. | nowrap |

|- ! | Alton Lennon | | Democratic | 1956 | Incumbent re-elected. | nowrap | Alton Lennon (Democratic) Unopposed

|- ! | Charles R. Jonas | | Republican | 1952 | Incumbent re-elected. | nowrap |

|- ! | Jim Broyhill | | Republican | 1962 | Incumbent re-elected. | nowrap |

|- ! | Basil Whitener | | Democratic | 1956 | Incumbent re-elected. | nowrap |

|- ! | Roy A. Taylor | | Democratic | 1960 | Incumbent re-elected. | nowrap |

North Dakota

|- ! | Mark Andrews | | Republican | 1963 | Incumbent re-elected. | nowrap |

|- ! | Rolland W. Redlin | | Democratic-NPL | 1964 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

Ohio

Ohio redistricted its at-large seat into a 24th district, splitting out the counties to the southwest of Dayton from the city itself, as well as moving a district in southeastern Ohio into the Columbus area.

|- ! | John J. Gilligan | | Democratic | 1964 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

|- ! | Donald D. Clancy | | Republican | 1960 | Incumbent re-elected. | nowrap |

|- ! | Rodney M. Love | | Democratic | 1964 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

|- ! | William M. McCulloch | | Republican | 1947 | Incumbent re-elected. | nowrap |

|- ! | Del Latta | | Republican | 1958 | Incumbent re-elected. | nowrap |

|- ! | Bill Harsha | | Republican | 1960 | Incumbent re-elected. | nowrap |

|- ! | Bud Brown | | Republican | 1965 | Incumbent re-elected. | nowrap | Bud Brown (Republican) Unopposed

|- ! | Jackson Edward Betts | | Republican | 1950 | Incumbent re-elected. | nowrap |

|- ! | Thomas L. Ashley | | Democratic | 1954 | Incumbent re-elected. | nowrap |

|- ! | Walter H. Moeller | | Democratic | 1964 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

|- ! | J. William Stanton | | Republican | 1964 | Incumbent re-elected. | nowrap |

|- ! | Samuel L. Devine | | Republican | 1958 | Incumbent re-elected. | nowrap |

|- ! | Charles Adams Mosher | | Republican | 1960 | Incumbent re-elected. | nowrap |

|- ! | William Hanes Ayres | | Republican | 1950 | Incumbent re-elected. | nowrap |

|- ! | colspan=3 | None (district created) | | New seat.<br/>Republican gain. | nowrap |

|- ! | Frank T. Bow | | Republican | 1950 | Incumbent re-elected. | nowrap |

|- ! rowspan=2 | | John M. Ashbrook | | Republican | 1960 | Incumbent re-elected. | rowspan=2 nowrap |

|- | Robert T. Secrest<br/> | | Democratic | 1962 | | Incumbent lost re-election.<br/>Democratic loss.

|- ! | Wayne Hays | | Democratic | 1948 | Incumbent re-elected. | nowrap |

|- ! | Michael J. Kirwan | | Democratic | 1936 | Incumbent re-elected. | nowrap |

|- ! | Michael A. Feighan | | Democratic | 1942 | Incumbent re-elected. | nowrap |

|- ! | Charles Vanik | | Democratic | 1954 | Incumbent re-elected. | nowrap |

|- ! | Frances P. Bolton | | Republican | 1940 | Incumbent re-elected. | nowrap |

|- ! | William E. Minshall Jr. | | Republican | 1954 | Incumbent re-elected. | nowrap |

|- ! | Robert E. Sweeney<br/> | | Democratic | 1964 | | Incumbent retired.<br/>Republican gain. | nowrap |

Oklahoma

|- ! | Page Belcher | | Republican | 1950 | Incumbent re-elected. | nowrap |

|- ! | Ed Edmondson | | Democratic | 1952 | Incumbent re-elected. | nowrap |

|- ! | Carl Albert | | Democratic | 1946 | Incumbent re-elected. | nowrap |

|- ! | Tom Steed | | Democratic | 1948 | Incumbent re-elected. | nowrap |

|- ! | John Jarman | | Democratic | 1950 | Incumbent re-elected. | nowrap |

|- ! | Jed Johnson Jr. | | Democratic | 1964 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

Oregon

|- ! | Wendell Wyatt | | Republican | 1964 | Incumbent re-elected. | nowrap |

|- ! | Al Ullman | | Democratic | 1956 | Incumbent re-elected. | nowrap |

|- ! | Edith Green | | Democratic | 1954 | Incumbent re-elected. | nowrap |

|- ! | Robert B. Duncan | | Democratic | 1962 | | Incumbent retired to run for U.S. Senator.<br/>Republican gain. | nowrap |

Pennsylvania

|- ! | William A. Barrett | | Democratic | 1944<br/>1946 <br/>1948 | Incumbent re-elected. | nowrap |

|- ! | Robert N. C. Nix Sr. | | Democratic | 1958 | Incumbent re-elected. | nowrap |

|- ! | James A. Byrne | | Democratic | 1952 | Incumbent re-elected. | nowrap |

|- ! | Herman Toll | | Democratic | 1958 | | Incumbent retired.<br/>Democratic hold. | nowrap |

|- ! | William J. Green III | | Democratic | 1964 | Incumbent re-elected. | nowrap |

|- ! | George M. Rhodes | | Democratic | 1948 | Incumbent re-elected. | nowrap |

|- ! | colspan=3 | None (district created) | | New seat.<br/>Republican gain. | nowrap |

|- ! | Willard S. Curtin | | Republican | 1956 | | Incumbent retired.<br/>Republican hold. | nowrap |

|- ! rowspan=2 | | George Watkins<br/> | | Republican | 1964 | Incumbent re-elected. | rowspan=2 nowrap |

|- | Paul B. Dague | | Republican | 1946 | | Incumbent retired.<br/>Republican loss.

|- ! | Joseph M. McDade | | Republican | 1962 | Incumbent re-elected. | nowrap |

|- ! | Dan Flood | | Democratic | 1944<br/>1946 <br/>1948<br/>1952 <br/>1954 | Incumbent re-elected. | nowrap |

|- ! | J. Irving Whalley | | Republican | 1960 | Incumbent re-elected. | nowrap |

|- ! | Richard Schweiker | | Republican | 1960 | Incumbent re-elected. | nowrap |

|- ! | William S. Moorhead | | Democratic | 1958 | Incumbent re-elected. | nowrap |

|- ! | Fred B. Rooney | | Democratic | 1963 | Incumbent re-elected. | nowrap |

|- ! | John C. Kunkel | | Republican | 1961 | | Incumbent retired.<br/>Republican hold. | nowrap |

|- ! | Herman T. Schneebeli | | Republican | 1960 | Incumbent re-elected. | nowrap |

|- ! | Robert J. Corbett | | Republican | 1938<br/>1940 <br/>1944 | Incumbent re-elected. | nowrap |

|- ! | Nathaniel N. Craley Jr. | | Democratic | 1964 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

|- ! | Elmer J. Holland | | Democratic | 1942<br/>1942 <br/>1956 | Incumbent re-elected. | nowrap |

|- ! | John Herman Dent | | Democratic | 1958 | Incumbent re-elected. | nowrap |

|- ! | John P. Saylor | | Republican | 1949 | Incumbent re-elected. | nowrap |

|- ! | Albert W. Johnson | | Republican | 1963 | Incumbent re-elected. | nowrap |

|- ! | Joseph P. Vigorito | | Democratic | 1964 | Incumbent re-elected. | nowrap |

|- ! | Frank M. Clark | | Democratic | 1954 | Incumbent re-elected. | nowrap |

|- ! | Thomas E. Morgan | | Democratic | 1944 | Incumbent re-elected. | nowrap |

|- ! | James G. Fulton | | Republican | 1944 | Incumbent re-elected. | nowrap |

Rhode Island

|- ! | Fernand St Germain | | Democratic | 1960 | Incumbent re-elected. | nowrap |

|- ! | John E. Fogarty | | Democratic | 1940 | Incumbent re-elected. | nowrap |

South Carolina

|- ! | L. Mendel Rivers | | Democratic | 1940 | Incumbent re-elected. | nowrap | L. Mendel Rivers (Democratic) Unopposed

|- ! | Albert Watson | | Republican | 1962 | Incumbent re-elected. | nowrap |

|- ! | William J. B. Dorn | | Democratic | 1946<br/>1948 <br/>1950 | Incumbent re-elected. | nowrap |

|- ! | Robert T. Ashmore | | Democratic | 1953 | Incumbent re-elected. | nowrap | Robert T. Ashmore (Democratic) Unopposed

|- ! | Thomas S. Gettys | | Democratic | 1964 | Incumbent re-elected. | nowrap | Thomas S. Gettys (Democratic) Unopposed

|- ! | John L. McMillan | | Democratic | 1938 | Incumbent re-elected. | nowrap |

South Dakota

|- ! | Ben Reifel | | Republican | 1960 | Incumbent re-elected. | nowrap |

|- ! | E. Y. Berry | | Republican | 1950 | Incumbent re-elected. | nowrap |

Tennessee

|- ! | Jimmy Quillen | | Republican | 1962 | Incumbent re-elected. | nowrap |

|- ! | John Duncan Sr. | | Republican | 1964 | Incumbent re-elected. | nowrap |

|- ! | Bill Brock | | Republican | 1962 | Incumbent re-elected. | nowrap |

|- ! | Joe L. Evins | | Democratic | 1946 | Incumbent re-elected. | nowrap |

|- ! | Richard Fulton | | Democratic | 1962 | Incumbent re-elected. | nowrap |

|- ! | William Anderson | | Democratic | 1964 | Incumbent re-elected. | nowrap |

|- ! | Tom J. Murray | | Democratic | 1942 | | Incumbent lost renomination.<br/>Democratic hold. | nowrap |

|- ! | Fats Everett | | Democratic | 1958 | Incumbent re-elected. | nowrap |

|- ! | George W. Grider | | Democratic | 1964 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

Texas

Texas redistricted for this election, eliminating its at-large district and removing two East Texas districts in favor of adding three districts in South Texas, suburban Houston, and suburban Dallas.

|- ! | Wright Patman | | Democratic | 1928 | Incumbent re-elected. | nowrap | Wright Patman (Democratic) Unopposed

|- ! | John Dowdy<br/> | | Democratic | 1952 | Incumbent re-elected. | nowrap | John Dowdy (Democratic) Unopposed

|- ! | Joe R. Pool<br/> | | Democratic | 1962 | Incumbent re-elected. | nowrap |

|- ! rowspan=2 | | Ray Roberts | | Democratic | 1962 | Incumbent re-elected. | rowspan=2 nowrap | Ray Roberts (Democratic) Unopposed

|- | Lindley Beckworth<br/> | | Democratic | 1956 | | Incumbent lost renomination.<br/>Democratic loss.

|- ! | Earle Cabell | | Democratic | 1964 | Incumbent re-elected. | nowrap |

|- ! | Olin E. Teague | | Democratic | 1946 | Incumbent re-elected. | nowrap | Olin E. Teague (Democratic) Unopposed

|- ! | colspan=3 | None (district created) | | New seat.<br/>Republican gain. | nowrap |

|- ! | Lera Millard Thomas | | Democratic | 1966 | | Incumbent retired.<br/>Democratic hold. | nowrap |

|- ! rowspan=2 | | Jack Brooks<br/> | | Democratic | 1952 | Incumbent re-elected. | rowspan=2 nowrap | Jack Brooks (Democratic) Unopposed

|- | Clark W. Thompson | | Democratic | 1947 | | Incumbent retired.<br/>Democratic loss.

|- ! | J. J. Pickle | | Democratic | 1963 | Incumbent re-elected. | nowrap |

|- ! | William R. Poage | | Democratic | 1936 | Incumbent re-elected. | nowrap |

|- ! | Jim Wright | | Democratic | 1954 | Incumbent re-elected. | nowrap | Jim Wright (Democratic) Unopposed

|- ! | Graham B. Purcell Jr. | | Democratic | 1962 | Incumbent re-elected. | nowrap |

|- ! | John Andrew Young | | Democratic | 1956 | Incumbent re-elected. | nowrap | John Andrew Young (Democratic) Unopposed

|- ! | Kika de la Garza | | Democratic | 1964 | Incumbent re-elected. | nowrap | Kika de la Garza (Democratic) Unopposed

|- ! | Richard Crawford White | | Democratic | 1964 | Incumbent re-elected. | nowrap | Richard Crawford White (Democratic) Unopposed

|- ! | Omar Burleson | | Democratic | 1946 | Incumbent re-elected. | nowrap | Omar Burleson (Democratic) Unopposed

|- ! | Walter E. Rogers | | Democratic | 1950 | | Incumbent retired.<br/>Republican gain. | nowrap |

|- ! | George H. Mahon | | Democratic | 1934 | Incumbent re-elected. | nowrap | George H. Mahon (Democratic) Unopposed

|- ! | Henry B. González | | Democratic | 1961 | Incumbent re-elected. | nowrap |

|- ! | O. C. Fisher | | Democratic | 1942 | Incumbent re-elected. | nowrap | O. C. Fisher (Democratic) Unopposed

|- ! | Robert R. Casey | | Democratic | 1958 | Incumbent re-elected. | nowrap | Robert R. Casey (Democratic) Unopposed

|- ! | colspan=3 | None (district created) | | New seat.<br/>Democratic gain. | nowrap |

Utah

|- ! | Laurence J. Burton | | Republican | 1962 | Incumbent re-elected. | nowrap |

|- ! | David S. King | | Democratic | 1964 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

Vermont

|- ! | Robert Stafford | | Republican | 1960 | Incumbent re-elected. | nowrap |

Virginia

|- ! | Thomas N. Downing | | Democratic | 1958 | Incumbent re-elected. | nowrap | Thomas N. Downing (Democratic) Unopposed

|- ! | Porter Hardy Jr. | | Democratic | 1946 | Incumbent re-elected. | nowrap | Porter Hardy Jr. (Democratic) Unopposed

|- ! | David E. Satterfield III | | Democratic | 1964 | Incumbent re-elected. | nowrap | David E. Satterfield III (Democratic) Unopposed

|- ! | Watkins Abbitt | | Democratic | 1948 | Incumbent re-elected. | nowrap |

|- ! | William M. Tuck | | Democratic | 1953 | Incumbent re-elected. | nowrap |

|- ! | Richard H. Poff | | Republican | 1952 | Incumbent re-elected. | nowrap |

|- ! | John O. Marsh Jr. | | Democratic | 1962 | Incumbent re-elected. | nowrap |

|- ! | Howard W. Smith | | Democratic | 1930 | | Incumbent lost renomination.<br/>Republican gain. | nowrap |

|- ! | W. Pat Jennings | | Democratic | 1954 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

|- ! | Joel Broyhill | | Republican | 1952 | Incumbent re-elected. | nowrap |

Washington

|- ! | Thomas Pelly | | Republican | 1952 | Incumbent re-elected. | nowrap |

|- ! | Lloyd Meeds | | Democratic | 1964 | Incumbent re-elected. | nowrap |

|- ! | Julia Butler Hansen | | Democratic | 1960 | Incumbent re-elected. | nowrap |

|- ! | Catherine Dean May | | Republican | 1958 | Incumbent re-elected. | nowrap |

|- ! | Tom Foley | | Democratic | 1964 | Incumbent re-elected. | nowrap |

|- ! | Floyd Hicks | | Democratic | 1964 | Incumbent re-elected. | nowrap |

|- ! | Brock Adams | | Democratic | 1964 | Incumbent re-elected. | nowrap |

West Virginia

|- ! | Arch A. Moore Jr. | | Republican | 1956 | Incumbent re-elected. | nowrap |

|- ! | Harley Orrin Staggers | | Democratic | 1948 | Incumbent re-elected. | nowrap |

|- ! | John M. Slack Jr. | | Democratic | 1958 | Incumbent re-elected. | nowrap |

|- ! | Ken Hechler | | Democratic | 1958 | Incumbent re-elected. | nowrap |

|- ! | James Kee | | Democratic | 1964 | Incumbent re-elected. | nowrap |

Wisconsin

|- ! | Lynn E. Stalbaum | | Democratic | 1964 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

|- ! | Robert Kastenmeier | | Democratic | 1958 | Incumbent re-elected. | nowrap |

|- ! | Vernon W. Thomson | | Republican | 1960 | Incumbent re-elected. | nowrap |

|- ! | Clement Zablocki | | Democratic | 1948 | Incumbent re-elected. | nowrap |

|- ! | Henry S. Reuss | | Democratic | 1954 | Incumbent re-elected. | nowrap |

|- ! | John Abner Race | | Democratic | 1964 | | Incumbent lost re-election.<br/>Republican gain. | nowrap |

|- ! | Melvin Laird | | Republican | 1952 | Incumbent re-elected. | nowrap |

|- ! | John W. Byrnes | | Republican | 1944 | Incumbent re-elected. | nowrap |

|- ! | Glenn Robert Davis | | Republican | 1947<br/>1956 <br/>1964 | Incumbent re-elected. | nowrap |

|- ! | Alvin O'Konski | | Republican | 1942 | Incumbent re-elected. | nowrap |

Wyoming

|- ! | Teno Roncalio | | Democratic | 1964 | | Incumbent retired to run for U.S. Senator.<br/>Republican gain. | nowrap |

See also

• 1966 United States elections
• 1966 United States gubernatorial elections
• 1966 United States Senate elections
• 89th United States Congress
• 90th United States Congress

References

Works cited

Further reading

• "1966 Elections–A Major Republican Comeback." in CQ Almanac 1966 (22nd ed., 1967) pp 1387–88. online
• , plus articles on the other western states in the same issue
• , Focus on 1966
• McLay, Mark. "A High-Wire Crusade: Republicans and the War on Poverty, 1966." Journal of Policy History 31.3 (2019): 382–405.