The 2018 United States House of Representatives elections were held on November 6, 2018. The 2018 House elections were midterm elections that occurred during President Donald Trump's first term in office. Early voting took place in some states in the weeks preceding Election Day. Voters chose representatives from all 435 congressional districts across each of the 50 U.S. states to serve in the 116th United States Congress. Prior to the 2018 elections, the Republican Party had held the House majority since January 2011.
Led by House Minority Leader Nancy Pelosi, the Democratic Party won control of the House of Representatives in the 2018 elections. The Democrats gained a net total of 41 seats. The 41-seat gain was the Democrats' largest gain of House seats since the post-Watergate 1974 elections, when they picked up 49 seats. Democrats also won the popular vote by an 8.6% margin, the largest margin of victory on record for a minority party.
The Democratic Party won control of the House of Representatives in the 2018 midterm elections. The Democrats gained a net total of 41 seats from the total number of seats they had won in the 2016 elections. This was their largest gain of House seats in an election since the 1974 elections, when the Democrats gained 49 House seats. Democrats won the popular vote by more than 9.7 million votes, or 8.6%, the largest margin of victory on record for a minority party.
Prior to the 2018 elections, the Republican Party had held the House majority since January 2011.
According to the Associated Press' statistical analysis, gerrymandering may have cost the Democrats 16 seats in the 2018 House elections.
Voter turnout in these elections was 50.3%, the highest turnout in a U.S. midterm election since 1914.
The House Republicans' passage of the widely unpopular American Health Care Act of 2017 to repeal the Affordable Care Act, as well as opposition to Trump's policies, his low approval ratings, and questions about his personal stamina for office, are credited for the Democratic takeover of the House.
(Note that the results summary does not include blank and over/under votes which were included in the official results or votes cast in the voided election in North Carolina's 9th congressional district.)
The Democratic Congressional Campaign Committee actively recruited military veterans and candidates with national security backgrounds for competitive districts in 2018. Political analysts noted that candidates with military experience could appeal to moderate and independent voters in swing districts. Of the 24 Republicans unseated by Democrats, eight were defeated by veterans or former national security officials, including Jason Crow (Colorado), Elissa Slotkin (Michigan), Mikie Sherrill (New Jersey), Chrissy Houlahan (Pennsylvania), and Elaine Luria (Virginia).
In the November general elections, 55 incumbents did not seek re-election. This election cycle saw the third most retirements in an election cycle in history behind 1992 and 2026.
Eighteen Democrats did not seek re-election.
Thirty-seven Republicans did not seek re-election.
Three Democrats (including one non-voting delegate) lost renomination.
Two Republicans lost renomination.
No Democrats lost re-election to Republicans.
Thirty Republicans lost re-election to Democrats.
Three open Democratic seats were won by Republicans.
Thirteen open Republican seats were won by Democrats.
Three Republicans, all of whom had already announced their retirement, resigned early.
Eighty-nine races were decided by 10% or lower.
Elections ordered by election date.
|- ! | Tim Murphy | | 2002 | data-sort-value=03/13/2018 | Incumbent resigned October 21, 2017.<br/>New member elected March 13, 2018.<br/>Democratic gain. | nowrap |
|- ! | Trent Franks | | 2002 | | Incumbent resigned December 8, 2017.<br/>New member elected April 24, 2018.<br/>Republican hold. | nowrap |
|- ! | Blake Farenthold | | 2010 | | Incumbent resigned April 6, 2018.<br/>New member elected June 30, 2018.<br/>Republican hold. | nowrap |
|- ! | Pat Tiberi | | 2000 | | Incumbent resigned January 15, 2018.<br/>New member elected August 7, 2018.<br/>Republican hold. | nowrap |
|- ! | John Conyers | | 1964 | | Incumbent resigned December 5, 2017.<br/>New member elected November 6, 2018.<br/>Democratic hold. | nowrap |
|- ! | Louise Slaughter | | 1986 | | Incumbent died March 16, 2018.<br/>New member elected November 6, 2018.<br/>Democratic hold. | nowrap |
|- ! | Pat Meehan | | 2010 | data-sort-value=11/06/2018 | Incumbent resigned April 27, 2018.<br/>New member elected November 6, 2018.<br/>Democratic gain. | nowrap |
|- ! | Charlie Dent | | 2004 | data-sort-value=11/06/2018 | Incumbent resigned May 12, 2018.<br/>New member elected November 6, 2018.<br/>Democratic gain. | nowrap |
Source: Edison Research exit poll for the National Election Pool
For the regularly scheduled November elections.
The state congressional delegation remained the same, at 6âÂÂ1 for Republicans.
Republicans maintained control of the sole seat in the state.
The state congressional delegation flipped from a 5âÂÂ4 Republican majority to a 5âÂÂ4 Democratic majority.
The state congressional delegation remained the same with a 4âÂÂ0 Republican majority.
The Democratic majority increased from 39âÂÂ14 to 46âÂÂ7.
The state congressional delegation flipped from a 4âÂÂ3 Republican majority to a 4âÂÂ3 Democratic majority.
The state congressional delegation remained unchanged at 5âÂÂ0 Democrats.
Democrats retained control of the sole seat in the state.
The Republican majority was reduced from 16âÂÂ11 to 14âÂÂ13.
The Republican majority was reduced from 10âÂÂ4 to 9âÂÂ5.
Hawaii maintained its 2-0 Democratic hold.
Idaho maintained its 2-0 Republican hold.
The Democratic majority increased from 11âÂÂ7 to 13âÂÂ5.
The Republican majority remained at 7âÂÂ2.
Iowa's delegation flipped from a 3âÂÂ1 Republican majority to a 3âÂÂ1 Democratic majority.
The Republican majority slipped from 4âÂÂ0 to 3âÂÂ1.
Republicans maintained their 5âÂÂ1 majority.
All incumbents were re-elected, and Republicans maintained their 5âÂÂ1 majority.
The 1âÂÂ1 tie became a 2âÂÂ0 Democratic hold. This was the first use of ranked choice voting to decide a House race.
Democrats maintained their 7âÂÂ1 majority.
Democrats maintained their 9âÂÂ0 hold.
The delegation flipped from a 9âÂÂ5 Republican majority to a 7âÂÂ7 split.
Although half of the seats switched parties, Democrats maintained the same 5âÂÂ3 majority.
The Republicans maintained their 3âÂÂ1 majority in the state.
The Republicans maintained their 6-2 seat majority.
Republicans maintained control of the lone house seat.
Republicans maintained their 3âÂÂ0 majority.
Democrats maintained their 3âÂÂ1 majority.
The Democrats maintained control of both house seats.
The state congressional delegation changed from 7âÂÂ5 for Democrats to 11âÂÂ1 for Democrats.
The state congressional delegation changed from 2âÂÂ1 for Democrats to all 3 seats controlled by Democrats.
Democrats increased their seat majority in New York's congressional delegation from 18âÂÂ9 to 21âÂÂ6.
Due to allegations of electoral fraud, the 116th Congress was sworn in with one seat vacant. On February 21, 2019, a new election was ordered by the state election board.
Republicans maintained control of the sole house seat.
The state congressional delegation remained the same at 12âÂÂ4 for Republicans.
The state congressional delegation changed from 5âÂÂ0 for Republicans to a 4âÂÂ1 Republican majority.
The state congressional delegation remained the same, with a 4âÂÂ1 Democratic majority.
As a result of changes in the congressional map, the state congressional delegation changed from a 13âÂÂ5 Republican majority to a 9âÂÂ9 split.
The state congressional delegation remained unchanged at 2âÂÂ0 for Democrats.
The state congressional delegation changed from 6âÂÂ1 for Republicans to 5âÂÂ2 for Republicans.
Republicans retained control of the sole seat in the state.
Republicans maintained their 7-2 seat majority.
The state congressional delegation changed from a 25âÂÂ11 Republican majority to a 23âÂÂ13 Republican majority.
The state congressional delegation changed from 4âÂÂ0 for Republicans to a 3âÂÂ1 Republican majority.
The Democrats maintained control of the sole seat in the state.
The state congressional delegation flipped from a 7âÂÂ4 Republican majority to a 7âÂÂ4 Democratic majority.
Democrats increased their seat majority from 6âÂÂ4 to 7âÂÂ3.
The state congressional delegation remained the same at 3âÂÂ0 for Republicans.
Republicans maintained their 5-3 seat majority.
Republicans maintained control of the sole seat in the state.
The election for a non-voting delegate from the Northern Mariana Islands was postponed until Tuesday, November 13, 2018, due to the impact of Typhoon Yutu.
The Resident Commissioner of Puerto Rico is not up for re-election until 2020. Currently held by Republican Jenniffer González, who was first elected in 2016, the Resident Commissioner is the only member of the United States House of Representatives to serve a four-year term.