The 7th United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1801, to March 4, 1803, during the first two years of Thomas Jefferson's presidency. The apportionment of seats in the House of Representatives was based on the 1790 United States census. Both chambers had a Democratic-Republican majority, except when the Senate held a two-day Special Senate session in order to provide advice to the new President Thomas Jefferson, when there was still a Federalist majority in the Senate.
The count below identifies party affiliations at the beginning of the first session of this Congress, and includes members from vacancies and newly admitted states, when they were first seated. Changes resulting from subsequent replacements are shown below in the "Changes in membership" section.
The Federalists still controlled the Senate when they held a two-day special Senate session in March 1801, which was called by outgoing President John Adams so that the Senate could provide advice to the new President Thomas Jefferson, but by the time Congress began its first regular session in December 1801 to start official business, the Democratic-Republicans had gained Senate control.
This list is arranged by chamber, then by state. Senators are listed by class, and representatives are listed by district.
Senators were elected by the state legislatures every two years, with one-third beginning new six-year terms with each Congress. Preceding the names in the list below are Senate class numbers, which indicate the cycle of their election. In this Congress, Class 1 meant their term ended with this Congress, facing re-election in 1802; Class 2 meant their term began in the last Congress, facing re-election in 1804; and Class 3 meant their term began in this Congress, facing re-election in 1806.
Due to uncertainty over Ohio's exact admittance date (see "States admitted, above") its two senators were not elected until the next Congress.
The names of representatives elected statewide on the general ticket or otherwise at-large, are preceded by an "At-large," and the names of those elected from districts, whether plural or single member, are preceded by their district numbers.
All representatives were elected statewide on a general ticket.
All representatives were elected statewide on a general ticket.
All representatives were elected statewide on a general ticket.
All representatives were elected statewide on a general ticket.
Both representatives were elected statewide on a general ticket.
The count below reflects changes from the beginning of the first session of this Congress.
There was 1 death, 8 resignations, and 2 seats added for a new state.
|- | Rhode Island<br>(2) | | Ray Greene (F) | Resigned March 5, 1801, after being nominated for a judicial position. His successor was elected. | | Christopher Ellery (DR) | Seated May 6, 1801
|- | South Carolina<br>(2) | | Charles Pinckney (DR) | Resigned June 6, 1801, after being appointed Minister to Spain. His successor was elected. | | Thomas Sumter (DR) | Seated December 15, 1801
|- | New Hampshire<br>(2) | | Samuel Livermore (F) | Resigned June 12, 1801. His successor was elected. | | Simeon Olcott (F) | Seated June 17, 1801
|- | Pennsylvania<br>(3) | | Peter Muhlenberg (DR) | Resigned June 30, 1801. His successor was appointed July 13, 1801, and then elected December 17, 1801. | | George Logan (DR) | Seated July 13, 1801
|- | Vermont<br>(3) | | Elijah Paine (F) | Resigned September 1, 1801. His successor was elected. | | Stephen R. Bradley (DR) | Seated October 15, 1801
|- | Maryland<br>(3) | | William Hindman (F) | Resigned November 19, 1801. His successor was elected. | | Robert Wright (DR) | Seated November 19, 1801
|- | Massachusetts<br>(3) | | Dwight Foster (F) | Resigned March 2, 1803. Not filled this Congress | Vacant
|- | New York<br>(3) | | John Armstrong Jr. (DR) | Resigned February 5, 1802. His successor was elected. | | DeWitt Clinton (DR) | Seated February 9, 1802
|- | New Hampshire<br>(3) | | James Sheafe (F) | Resigned June 14, 1802. His successor was elected. | | William Plumer (F) | Seated June 17, 1802
|- | South Carolina<br>(3) | | John E. Colhoun (DR) | Died October 26, 1802. His successor was elected. | | Pierce Butler (DR) | Seated November 4, 1802
|- | Ohio<br>(1) | rowspan=2 | New seats | rowspan=2 style="font-size:80%" |Ohio was admitted to the Union on November 29, 1802. | Vacant | rowspan=2 | Not filled this Congress
|- | Ohio<br>(3) | Vacant
|- | | Vacant | Elizur Goodrich (F) resigned before the beginning of this Congress. | | Calvin Goddard (F) | May 14, 1801
|- | | Vacant | William Edmond (F) resigned before the beginning of this Congress. | | Benjamin Tallmadge (F) | September 21, 1801
|- | | Vacant | Representative-elect George Thatcher declined to serve.<br/>Successor elected June 22, 1801. | | Richard Cutts (DR) | December 7, 1801
|- | | | Levi Lincoln (DR) | Resigned March 5, 1801, after being appointed US Attorney General. | | Seth Hastings (F) | January 11, 1802
|- | | | John Bird (F) | Resigned July 25, 1801. | | John Peter Van Ness (DR) | December 7, 1801
|- | | | Thomas Tillotson (DR) | Resigned August 10, 1801, upon appointment as NY Secretary of State. | | Theodorus Bailey (DR) | December 7, 1801
|- | | | Silas Lee (F) | Resigned August 20, 1801. | | Samuel Thatcher (F) | December 6, 1802
|- | | | Thomas Sumter (DR) | Resigned December 15, 1801, after being elected to the US Senate. | | Richard Winn (DR) | January 24, 1802
|- | | | Benjamin Taliaferro (DR) | Resigned sometime in 1802. | | David Meriwether (DR) | December 6, 1802
|- | | | Joseph Peirce (F) | Resigned sometime in 1802. | | Samuel Hunt (F) | December 6, 1802
|- | | | Richard Sprigg Jr. (DR) | Resigned February 11, 1802. | | Walter Bowie (DR) | March 24, 1802
|- | | |Narsworthy Hunter (DR) | Died March 11, 1802. | |Thomas M. Green Jr. (DR) | December 6, 1802
|- | | | John Milledge (DR) | Resigned May 1802 after being elected Governor. | | Peter Early (DR) | January 10, 1803
|- | | | Charles Johnson (DR) | Died July 23, 1802. | | Thomas Wynns (DR) | December 7, 1802
|- | | New seat | Ohio was admitted to the Union on November 29, 1802. | Vacant | rowspan=2 | Not filled until next Congress
|- | | | John Peter Van Ness (DR) | Seat declared forfeited January 17, 1803. | Vacant
Lists of committees and their party leaders.