2004 United States House of Representatives elections
The 2004 United States House of Representatives elections were held on November 2, 2004, to elect all 435 seats of the chamber. It coincided with the re-election of President George W. Bush as well as many Senate elections and gubernatorial elections. Prior to the election in the 108th Congress, [United States United States Republican Party|Republican Party|Republicans] held 227 seats, [United States United States Democratic Party|Democratic Party|Democrats] held 205, with two Republican vacancies and one independent. As a result of this election, the 109th Congress began composed of 232 Republicans, 201 Democrats, one independent, and one vacancy.
Democrats won open seats in [|Colorado], [|South Dakota], and [|New York] while ousting incumbents in [|Georgia] and [|Illinois]. Republicans won an open seat in Kentucky while ousting an incumbent in Indiana. They gained five seats in Texas after a controversial mid-decade redistricting placed several rural Democratic incumbents into new districts. Two seats in [|Louisiana] swapped party control.
, this is the last election in which someone who was not from the Democratic or Republican Party was elected to the House. Republicans would not make consecutive net gains in the House until 2020 and 2022. This was also the last election in which the Republicans made any gains in a presidential election year until 2020.
Results
Federal
! rowspan= 2 colspan=2 | Parties
! colspan=4 | Seats
! colspan=3 | Popular vote
! 2002
! 2004
! Net
change
! Strength
! Vote
! %
! Change
! Republican Party
! Democratic Party
! Libertarian Party
! Independent
! Green Party
! Constitution Party
! Reform Party
! Independence Party
! Others
! colspan=2 | Total
! 434
! 435
! 0
! 100.0%
! 113,192,286
! 100.0%
! –
Retirements
In the November general elections, thirty incumbents did not seek re-election, either to retire or to seek other positions.Democrats
Thirteen Democrats did not seek re-election.- : Cal Dooley retired.
- : Peter Deutsch retired to run for U.S. Senator.
- : Denise Majette retired to run for U.S. Senator.
- : Bill Lipinski retired.
- : Ken Lucas retired.
- : Chris John retired to run for U.S. Senator.
- : Dick Gephardt retired to run for U.S. president.
- : Karen McCarthy retired.
- : Brad Carson retired to run for U.S. Senator.
- : Joe Hoeffel retired to run for U.S. Senator.
- : Aníbal Acevedo Vilá retired to run for Governor of Puerto Rico.
- : Jim Turner retired when redistricted from the 2nd district.
- : Jerry Kleczka retired.
Republicans
Seventeen Republicans did not seek re-election.- : Doug Ose retired.
- : Scott McInnis retired.
- : Johnny Isakson retired to run for U.S. Senator.
- : Mac Collins retired to run for U.S. Senator.
- : David Vitter retired to run for U.S. Senator.
- : Billy Tauzin retired.
- : Nick Smith retired.
- : Jack Quinn retired.
- : Amo Houghton retired.
- : Richard Burr retired to run for U.S. Senator.
- : Cass Ballenger retired.
- : James C. Greenwood retired.
- : Pat Toomey retired to run for U.S. Senator.
- : Jim DeMint retired to run for U.S. Senator.
- : Ed Schrock retired.
- : George Nethercutt retired to run for U.S. Senator.
- : Jennifer Dunn retired.
Resignations
Two seats opened early due to resignations and were not filled until the November elections.Democrats
No Democrats resigned.Republicans
Two Republicans resigned.- : Porter Goss resigned September 23, 2004 to become Director of the Central Intelligence Agency.
- : Doug Bereuter resigned August 31, 2004 to become president of The Asia Foundation.
Incumbents defeated
In primary elections
Democrats
Two Democrats lost renomination.- : Chris Bell lost to Al Green, who won the general election.
- : Ciro Rodriguez lost to Henry Cuellar, who won the general election.
Republicans
No Republicans lost renomination. This was the first time this had occurred since 1984.In the general election
Democrats
Five Democrats lost re-election to Republicans.- : Baron Hill lost to Mike Sodrel.
- : Max Sandlin lost to Louie Gohmert.
- : Nick Lampson lost to Ted Poe.
- : Charles Stenholm lost a redistricting race to Randy Neugebauer.
- : Martin Frost lost a redistricting race to Pete Sessions.
Republicans
Two Republicans lost re-election to Democrats.- : Max Burns lost to John Barrow.
- : Phil Crane lost to Melissa Bean.
Open seats that changed parties
Democratic seats won by Republicans
Three Democratic seats were won by Republicans.- : Won by Geoff Davis.
- : Won by Charles Boustany.
- : Won by Luis Fortuño.
Republican seats won by Democrats
Three Republican seats were won by Democrats.- : Won by John Salazar.
- : Won by Charlie Melancon.
- : Won by Brian Higgins.
Open seats that parties held
Democratic seats held by Democrats
Democrats held nine of their open seats.- : Won by Jim Costa.
- : Won by Debbie Wasserman Schultz.
- : Won by Cynthia McKinney.
- : Won by Dan Lipinski.
- : Won by Russ Carnahan.
- : Won by Emanuel Cleaver.
- : Won by Dan Boren.
- : Won by Allyson Schwartz.
- : Won by Gwen Moore.
Republican seats held by Republicans
Republicans held sixteen of their open seats.- : Won by Dan Lungren.
- : Won by Connie Mack IV.
- : Won by Tom Price.
- : Won by Lynn Westmoreland.
- : Won by Bobby Jindal.
- : Won by Joe Schwarz.
- : Won by Jeff Fortenberry.
- : Won by Randy Kuhl.
- : Won by Virginia Foxx.
- : Won by Patrick McHenry.
- : Won by Mike Fitzpatrick.
- : Won by Charlie Dent.
- : Won by Bob Inglis.
- : Won by Thelma Drake.
- : Won by Cathy McMorris.
- : Won by Dave Reichert.
Newly created seats
Of the thirty-two seats created in the 2003 Texas redistricting, three had no incumbent representative.Democratic gain
No Democrats were elected in newly created seats.Republican gain
Three Republicans were elected in newly created seats.- : Won by Michael McCaul.
- : Won by Mike Conaway.
- : Won by Kenny Marchant.
Closest races
Twenty-three races were decided by 10% or lower.| District | Winner | Margin |
| data-sort-value=-1 | 0.49% | |
| data-sort-value=-1 | 0.50% | |
| data-sort-value=-1 | 1.33% | |
| data-sort-value=-1 | 2.02% | |
| data-sort-value=-1 | 3.39% | |
| data-sort-value=-1 | 3.62% | |
| data-sort-value=-1 | 3.78% | |
| data-sort-value=-1 | 3.99% | |
| data-sort-value=-1 | 4.68% | |
| data-sort-value=-1 | 4.80% | |
| data-sort-value=-1 | 6.27% | |
| data-sort-value=-1 | 6.80% | |
| data-sort-value=-1 | 7.45% | |
| data-sort-value=-1 | 7.72% | |
| data-sort-value=-1 | 8.05% | |
| data-sort-value=-1 | 8.36% | |
| data-sort-value=-1 | 8.53% | |
| data-sort-value=-1 | 8.82% | |
| data-sort-value=-1 | 8.87% | |
| data-sort-value=-1 | 9.63% | |
| data-sort-value=-1 | 9.80% | |
| data-sort-value=-1 | 9.86% | |
| data-sort-value=-1 | 9.92% |
Special elections
There were three special elections held in 2004, all of them separate from the November elections.!
!
!
Alabama
| District | Incumbent | Party | First elected | Result | Candidates |
| Jo Bonner | Republican | 2002 | Incumbent re-elected. | ||
| Terry Everett | Republican | 1992 | Incumbent re-elected. | ||
| Mike D. Rogers | Republican | 2002 | Incumbent re-elected. | ||
| Robert Aderholt | Republican | 1996 | Incumbent re-elected. | ||
| Robert E. Cramer | Democratic | 1990 | Incumbent re-elected. | ||
| Spencer Bachus | Republican | 1992 | Incumbent re-elected. | ||
| Artur Davis | Democratic | 2002 | Incumbent re-elected. |
Alaska
| District | Incumbent | Party | First elected | Result | Candidates |
| Don Young | Republican | 1973 | Incumbent re-elected. |
Arizona
| District | Incumbent | Party | First elected | Result | Candidates |
| Rick Renzi | Republican | 2002 | Incumbent re-elected. | ||
| Trent Franks | Republican | 2002 | Incumbent re-elected. | ||
| John Shadegg | Republican | 1994 | Incumbent re-elected. | ||
| Ed Pastor | Democratic | 1991 | Incumbent re-elected. | ||
| J. D. Hayworth | Republican | 1994 | Incumbent re-elected. | ||
| Jeff Flake | Republican | 2000 | Incumbent re-elected. | ||
| Raúl Grijalva | Democratic | 2002 | Incumbent re-elected. | ||
| Jim Kolbe | Republican | 1984 | Incumbent re-elected. |
Arkansas
| District | Incumbent | Party | First elected | Result | Candidates |
| Robert Marion Berry | Democratic | 1996 | Incumbent re-elected. | ||
| Vic Snyder | Democratic | 1996 | Incumbent re-elected. | ||
| John Boozman | Republican | 2000 | Incumbent re-elected. | ||
| Mike Ross | Democratic | 2000 | Incumbent re-elected. |
California
| District | Incumbent | Party | First elected | Result | Candidates |
| Mike Thompson | Democratic | 1998 | Incumbent re-elected. | ||
| Wally Herger | Republican | 1988 | Incumbent re-elected. | ||
| Doug Ose | Republican | 1998 | Incumbent retired. Republican hold. | ||
| John Doolittle | Republican | 1990 | Incumbent re-elected. | ||
| Bob Matsui | Democratic | 1978 | Incumbent re-elected. | ||
| Lynn Woolsey | Democratic | 1992 | Incumbent re-elected. | ||
| George Miller | Democratic | 1974 | Incumbent re-elected. | ||
| Nancy Pelosi | Democratic | 1987 | Incumbent re-elected. | ||
| Barbara Lee | Democratic | 1998 | Incumbent re-elected. | ||
| Ellen Tauscher | Democratic | 1996 | Incumbent re-elected. | ||
| Richard Pombo | Republican | 1992 | Incumbent re-elected. | ||
| Tom Lantos | Democratic | 1980 | Incumbent re-elected. | ||
| Pete Stark | Democratic | 1972 | Incumbent re-elected. | ||
| Anna Eshoo | Democratic | 1992 | Incumbent re-elected. | ||
| Mike Honda | Democratic | 2000 | Incumbent re-elected. | ||
| Zoe Lofgren | Democratic | 1994 | Incumbent re-elected. | ||
| Sam Farr | Democratic | 1992 | Incumbent re-elected. | ||
| Dennis Cardoza | Democratic | 2002 | Incumbent re-elected. | ||
| George Radanovich | Republican | 1996 | Incumbent re-elected. | ||
| Cal Dooley | Democratic | 1990 | Incumbent retired. Democratic hold. | ||
| Devin Nunes | Republican | 2000 | Incumbent re-elected. | ||
| Bill Thomas | Republican | 1978 | Incumbent re-elected. | ||
| Lois Capps | Democratic | 1998 | Incumbent re-elected. | ||
| Elton Gallegly | Republican | 1986 | Incumbent re-elected. | ||
| Buck McKeon | Republican | 1992 | Incumbent re-elected. | ||
| David Dreier | Republican | 1980 | Incumbent re-elected. | ||
| Brad Sherman | Democratic | 1996 | Incumbent re-elected. | ||
| Howard Berman | Democratic | 1982 | Incumbent re-elected. | ||
| Adam Schiff | Democratic | 2000 | Incumbent re-elected. | ||
| Henry Waxman | Democratic | 1974 | Incumbent re-elected. | ||
| Xavier Becerra | Democratic | 1992 | Incumbent re-elected. | ||
| Hilda Solis | Democratic | 2000 | Incumbent re-elected. | ||
| Diane Watson | Democratic | 2001 | Incumbent re-elected. | ||
| Lucille Roybal-Allard | Democratic | 1992 | Incumbent re-elected. | ||
| Maxine Waters | Democratic | 1990 | Incumbent re-elected. | ||
| Jane Harman | Democratic | 1992 1998 2000 | Incumbent re-elected. | ||
| Juanita Millender-McDonald | Democratic | 1996 | Incumbent re-elected. | ||
| Grace Napolitano | Democratic | 1998 | Incumbent re-elected. | ||
| Linda Sánchez | Democratic | 2002 | Incumbent re-elected. | ||
| Ed Royce | Republican | 1992 | Incumbent re-elected. | ||
| Jerry Lewis | Republican | 1978 | Incumbent re-elected. | ||
| Gary Miller | Republican | 1998 | Incumbent re-elected. | ||
| Joe Baca | Democratic | 1999 | Incumbent re-elected. | ||
| Ken Calvert | Republican | 1992 | Incumbent re-elected. | ||
| Mary Bono | Republican | 1998 | Incumbent re-elected. | ||
| Dana Rohrabacher | Republican | 1988 | Incumbent re-elected. | ||
| Loretta Sanchez | Democratic | 1996 | Incumbent re-elected. | ||
| Christopher Cox | Republican | 1988 | Incumbent re-elected. | ||
| Darrell Issa | Republican | 2000 | Incumbent re-elected. | ||
| Duke Cunningham | Republican | 1990 | Incumbent re-elected. | ||
| Bob Filner | Democratic | 1992 | Incumbent re-elected. | ||
| Duncan L. Hunter | Republican | 1980 | Incumbent re-elected. | ||
| Susan Davis | Democratic | 2000 | Incumbent re-elected. |
Colorado
| District | Incumbent | Party | First elected | Result | Candidates |
| Diana DeGette | Democratic | 1996 | Incumbent re-elected. | ||
| Mark Udall | Democratic | 1998 | Incumbent re-elected. | ||
| Scott McInnis | Republican | 1992 | Incumbent retired. Democratic gain. | ||
| Marilyn Musgrave | Republican | 2002 | Incumbent re-elected. | ||
| Joel Hefley | Republican | 1986 | Incumbent re-elected. | ||
| Tom Tancredo | Republican | 1998 | Incumbent re-elected. | ||
| Bob Beauprez | Republican | 2002 | Incumbent re-elected. |
Connecticut
| District | Incumbent | Party | First elected | Result | Candidates |
| John B. Larson | Democratic | 1998 | Incumbent re-elected. | ||
| Rob Simmons | Republican | 2000 | Incumbent re-elected. | ||
| Rosa DeLauro | Democratic | 1990 | Incumbent re-elected. | ||
| Chris Shays | Republican | 1987 | Incumbent re-elected. | ||
| Nancy Johnson | Republican | 1982 | Incumbent re-elected. |
Delaware
| District | Incumbent | Party | First elected | Result | Candidates |
| Mike Castle | Republican | 1992 | Incumbent re-elected. |
Georgia
| District | Incumbent | Party | First elected | Result | Candidates |
| Jack Kingston | Republican | 1992 | Incumbent re-elected. | ||
| Sanford Bishop | Democratic | 1992 | Incumbent re-elected. | ||
| Jim Marshall | Democratic | 2002 | Incumbent re-elected. | ||
| Denise Majette | Democratic | 2002 | Incumbent retired to run for U.S. Senator. Democratic hold. | ||
| John Lewis | Democratic | 1986 | Incumbent re-elected. | ||
| Johnny Isakson | Republican | 1998 | Incumbent retired to run for U.S. Senator. Republican hold. | ||
| John Linder | Republican | 1992 | Incumbent re-elected. | ||
| Mac Collins | Republican | 1992 | Incumbent retired to run for U.S. Senator. Republican hold. | ||
| Charlie Norwood | Republican | 1994 | Incumbent re-elected. | ||
| Nathan Deal | Republican | 1992 | Incumbent re-elected. | ||
| Phil Gingrey | Republican | 2002 | Incumbent re-elected. | ||
| Max Burns | Republican | 2002 | Incumbent lost re-election. Democratic gain. | ||
| David Scott | Democratic | 2002 | Incumbent re-elected. |
Hawaii
| District | Incumbent | Party | First elected | Result | Candidates |
| Neil Abercrombie | Democratic | 1986 1988 1990 | Incumbent re-elected. | ||
| Ed Case | Democratic | 2002 | Incumbent re-elected. |
Idaho
| District | Incumbent | Party | First elected | Result | Candidates |
| Butch Otter | Republican | 2000 | Incumbent re-elected. | ||
| Mike Simpson | Republican | 1998 | Incumbent re-elected. |
Illinois
| District | Incumbent | Party | First elected | Result | Candidates |
| Bobby Rush | Democratic | 1992 | Incumbent re-elected. | ||
| Jesse Jackson Jr. | Democratic | 1995 | Incumbent re-elected. | ||
| Bill Lipinski | Democratic | 1982 | Incumbent retired. Democratic hold. | ||
| Luis Gutiérrez | Democratic | 1992 | Incumbent re-elected. | ||
| Rahm Emanuel | Democratic | 2002 | Incumbent re-elected. | ||
| Henry Hyde | Republican | 1974 | Incumbent re-elected. | ||
| Danny K. Davis | Democratic | 1996 | Incumbent re-elected. | ||
| Phil Crane | Republican | 1969 | Incumbent lost re-election. Democratic gain. | ||
| Jan Schakowsky | Democratic | 1998 | Incumbent re-elected. | ||
| Mark Kirk | Republican | 2000 | Incumbent re-elected. | ||
| Jerry Weller | Republican | 1994 | Incumbent re-elected. | ||
| Jerry Costello | Democratic | 1988 | Incumbent re-elected. | ||
| Judy Biggert | Republican | 1998 | Incumbent re-elected. | ||
| Dennis Hastert | Republican | 1986 | Incumbent re-elected. | ||
| Tim Johnson | Republican | 2000 | Incumbent re-elected. | ||
| Don Manzullo | Republican | 1992 | Incumbent re-elected. | ||
| Lane Evans | Democratic | 1982 | Incumbent re-elected. | ||
| Ray LaHood | Republican | 1994 | Incumbent re-elected. | ||
| John Shimkus | Republican | 1996 | Incumbent re-elected. |
Indiana
| District | Incumbent | Party | First elected | Result | Candidates |
| Pete Visclosky | Democratic | 1984 | Incumbent re-elected. | ||
| Chris Chocola | Republican | 2002 | Incumbent re-elected. | ||
| Mark Souder | Republican | 1994 | Incumbent re-elected. | ||
| Steve Buyer | Republican | 1992 | Incumbent re-elected. | ||
| Dan Burton | Republican | 1982 | Incumbent re-elected. | ||
| Mike Pence | Republican | 2000 | Incumbent re-elected. | ||
| Julia Carson | Democratic | 1996 | Incumbent re-elected. | ||
| John Hostettler | Republican | 1994 | Incumbent re-elected. | ||
| Baron Hill | Democratic | 1998 | Incumbent lost re-election. Republican gain. |
Iowa
| District | Incumbent | Party | First elected | Result | Candidates |
| Jim Nussle | Republican | 1990 | Incumbent re-elected. | ||
| Jim Leach | Republican | 1976 | Incumbent re-elected. | ||
| Leonard Boswell | Democratic | 1996 | Incumbent re-elected. | ||
| Tom Latham | Republican | 1994 | Incumbent re-elected. | ||
| Steve King | Republican | 2002 | Incumbent re-elected. |
Kansas
| District | Incumbent | Party | First elected | Result | Candidates |
| Jerry Moran | Republican | 1996 | Incumbent re-elected. | ||
| Jim Ryun | Republican | 1996 | Incumbent re-elected. | ||
| Dennis Moore | Democratic | 1998 | Incumbent re-elected. | ||
| Todd Tiahrt | Republican | 1994 | Incumbent re-elected. |
Kentucky
| District | Incumbent | Party | First elected | Result | Candidates |
| Ed Whitfield | Republican | 1994 | Incumbent re-elected. | ||
| Ron Lewis | Republican | 1994 | Incumbent re-elected. | ||
| Anne Northup | Republican | 1996 | Incumbent re-elected. | ||
| Ken Lucas | Democratic | 1998 | Incumbent retired. Republican gain. | ||
| Hal Rogers | Republican | 1980 | Incumbent re-elected. | ||
| Ben Chandler | Democratic | 2004 Special | Incumbent re-elected. |
Louisiana
On December 4, 2004, a run-off election was held to determine the winner of the 3rd and 7th congressional districts. In the 3rd district, Charlie Melancon narrowly defeated Billy Tauzin III. In the 7th district, Charles Boustany defeated Willie Mount. Thus, both seats switched to the opposite party.| District | Incumbent | Party | First elected | Result | Candidates |
| David Vitter | Republican | 1999 | Incumbent retired to run for U.S. Senator. Republican hold. | ||
| William J. Jefferson | Democratic | 1990 | Incumbent re-elected. | ||
| Billy Tauzin | Republican | 1980 | Incumbent retired. Democratic gain. | ||
| Jim McCrery | Republican | 1988 | Incumbent re-elected. | ||
| Rodney Alexander | Republican | 2002 | Incumbent re-elected. | ||
| Richard Baker | Republican | 1986 | Incumbent re-elected. | ||
| Chris John | Democratic | 1996 | Incumbent retired to run for U.S. Senator. Republican gain. |
Maine
| District | Incumbent | Party | First elected | Result | Candidates |
| Tom Allen | Democratic | 2002 | Incumbent re-elected. | ||
| Mike Michaud | Democratic | 2002 | Incumbent re-elected. |
Maryland
| District | Incumbent | Party | First elected | Result | Candidates |
| Wayne Gilchrest | Republican | 1990 | Incumbent re-elected. | ||
| Dutch Ruppersberger | Democratic | 2002 | Incumbent re-elected. | ||
| Ben Cardin | Democratic | 1986 | Incumbent re-elected. | ||
| Albert Wynn | Democratic | 1992 | Incumbent re-elected. | ||
| Steny Hoyer | Democratic | 1981 | Incumbent re-elected. | ||
| Roscoe Bartlett | Republican | 1992 | Incumbent re-elected. | ||
| Elijah Cummings | Democratic | 1996 | Incumbent re-elected. | ||
| Chris Van Hollen | Democratic | 2002 | Incumbent re-elected. |
Massachusetts
| District | Incumbent | Party | First elected | Result | Candidates |
| Massachusetts 1 | John Olver | Democratic | 1991 | Incumbent re-elected. | |
| Massachusetts 2 | Richard Neal | Democratic | 1988 | Incumbent re-elected. | |
| Massachusetts 3 | Jim McGovern | Democratic | 1996 | Incumbent re-elected. | |
| Massachusetts 4 | Barney Frank | Democratic | 1980 | Incumbent re-elected. | |
| Massachusetts 5 | Marty Meehan | Democratic | 1992 | Incumbent re-elected. | |
| Massachusetts 6 | John F. Tierney | Democratic | 1996 | Incumbent re-elected. | |
| Massachusetts 7 | Ed Markey | Democratic | 1976 | Incumbent re-elected. | |
| Massachusetts 8 | Mike Capuano | Democratic | 1998 | Incumbent re-elected. | |
| Massachusetts 9 | Stephen Lynch | Democratic | 2001 | Incumbent re-elected. | |
| Massachusetts 10 | Bill Delahunt | Democratic | 1996 | Incumbent re-elected. |
Michigan
| District | Incumbent | Party | First elected | Result | Candidates |
| Bart Stupak | Democratic | 1992 | Incumbent re-elected. | ||
| Pete Hoekstra | Republican | 1992 | Incumbent re-elected. | ||
| Vern Ehlers | Republican | 1993 | Incumbent re-elected. | ||
| David Lee Camp | Republican | 1990 | Incumbent re-elected. | ||
| Dale E. Kildee | Democratic | 1976 | Incumbent re-elected. | ||
| Fred Upton | Republican | 1986 | Incumbent re-elected. | ||
| Nick Smith | Republican | 1992 | Incumbent retired. Republican hold. | ||
| Mike Rogers | Republican | 2000 | Incumbent re-elected. | ||
| Joe Knollenberg | Republican | 1992 | Incumbent re-elected. | ||
| Candice Miller | Republican | 2002 | Incumbent re-elected. | ||
| Thad McCotter | Republican | 2002 | Incumbent re-elected. | ||
| Sander Levin | Democratic | 1982 | Incumbent re-elected. | ||
| Carolyn Cheeks Kilpatrick | Democratic | 1996 | Incumbent re-elected. | ||
| John Conyers Jr. | Democratic | 1964 | Incumbent re-elected. | ||
| John Dingell Jr. | Democratic | 1955 | Incumbent re-elected. |
Minnesota
All incumbents were re-elected.| District | Incumbent | Party | First elected | Result | Candidates |
| Gil Gutknecht | Republican | 1994 | Incumbent re-elected. | ||
| John Kline | Republican | 2002 | Incumbent re-elected. | ||
| Jim Ramstad | Republican | 1990 | Incumbent re-elected. | ||
| Betty McCollum | DFL | 2000 | Incumbent re-elected. | ||
| Martin Olav Sabo | DFL | 1978 | Incumbent re-elected. | ||
| Mark Kennedy | Republican | 2000 | Incumbent re-elected. | ||
| Collin Peterson | DFL | 1990 | Incumbent re-elected. | ||
| Jim Oberstar | DFL | 1974 | Incumbent re-elected. |
Mississippi
| District | Incumbent | Party | First elected | Result | Candidates |
| Roger Wicker | Republican | 1994 | Incumbent re-elected. | ||
| Bennie Thompson | Democratic | 1993 | Incumbent re-elected. | ||
| Chip Pickering | Republican | 1996 | Incumbent re-elected. | ||
| Gene Taylor | Democratic | 1989 | Incumbent re-elected. |
Missouri
| District | Incumbent | Party | First elected | Result | Candidates |
| Lacy Clay | Democratic | 2000 | Incumbent re-elected. | ||
| Todd Akin | Republican | 2000 | Incumbent re-elected. | ||
| Dick Gephardt | Democratic | 1976 | Incumbent retired. Democratic hold. | ||
| Ike Skelton | Democratic | 1976 | Incumbent re-elected. | ||
| Karen McCarthy | Democratic | 1994 | Incumbent retired. Democratic hold. | ||
| Sam Graves | Republican | 2000 | Incumbent re-elected. | ||
| Roy Blunt | Republican | 1996 | Incumbent re-elected. | ||
| Jo Ann Emerson | Republican | 1996 | Incumbent re-elected. | ||
| Kenny Hulshof | Republican | 1996 | Incumbent re-elected. |
Montana
| District | Incumbent | Party | First elected | Result | Candidates |
| Denny Rehberg | Republican | 2000 | Incumbent re-elected. |
Nevada
| District | Incumbent | Party | First elected | Result | Candidates |
| Shelley Berkley | Democratic | 1998 | Incumbent re-elected. | ||
| Jim Gibbons | Republican | 1996 | Incumbent re-elected. | ||
| Jon Porter | Republican | 2002 | Incumbent re-elected. |
New Hampshire
| District | Incumbent | Party | First elected | Result | Candidates |
| Jeb Bradley | Republican | 2002 | Incumbent re-elected. | ||
| Charlie Bass | Republican | 1994 | Incumbent re-elected. |
New Jersey
| District | Incumbent | Party | First elected | Result | Candidates |
| Rob Andrews | Democratic | 1990 | Incumbent re-elected. | ||
| Frank LoBiondo | Republican | 1994 | Incumbent re-elected. | ||
| Jim Saxton | Republican | 1984 | Incumbent re-elected. | ||
| Chris Smith | Republican | 1980 | Incumbent re-elected. | ||
| Scott Garrett | Republican | 2002 | Incumbent re-elected. | ||
| Frank Pallone | Democratic | 1988 | Incumbent re-elected. | ||
| Mike Ferguson | Republican | 2000 | Incumbent re-elected. | ||
| Bill Pascrell | Democratic | 1996 | Incumbent re-elected. | ||
| Steve Rothman | Democratic | 1996 | Incumbent re-elected. | ||
| Donald M. Payne | Democratic | 1988 | Incumbent re-elected. | ||
| Rodney Frelinghuysen | Republican | 1994 | Incumbent re-elected. | ||
| Rush D. Holt Jr. | Democratic | 1998 | Incumbent re-elected. | ||
| Bob Menendez | Democratic | 1992 | Incumbent re-elected. |
New Mexico
| District | Incumbent | Party | First elected | Result | Candidates |
| Heather Wilson | Republican | 1998 | Incumbent re-elected. | ||
| Steve Pearce | Republican | 2002 | Incumbent re-elected. | ||
| Tom Udall | Democratic | 1998 | Incumbent re-elected. |
New York
| District | Incumbent | Party | First elected | Result | Candidates |
| Tim Bishop | Democratic | 2002 | Incumbent re-elected. | ||
| Steve Israel | Democratic | 2000 | Incumbent re-elected. | ||
| Peter King | Republican | 1992 | Incumbent re-elected. | ||
| Carolyn McCarthy | Democratic | 1996 | Incumbent re-elected. | ||
| Gary Ackerman | Democratic | 1983 | Incumbent re-elected. | ||
| Gregory Meeks | Democratic | 1998 | Incumbent re-elected. | ||
| Joseph Crowley | Democratic | 1998 | Incumbent re-elected. | ||
| Jerry Nadler | Democratic | 1992 | Incumbent re-elected. | ||
| Anthony Weiner | Democratic | 1998 | Incumbent re-elected. | ||
| Edolphus Towns | Democratic | 1982 | Incumbent re-elected. | ||
| Major Owens | Democratic | 1982 | Incumbent re-elected. | ||
| Nydia Velázquez | Democratic | 1992 | Incumbent re-elected. | ||
| Vito Fossella | Republican | 1997 | Incumbent re-elected. | ||
| Carolyn Maloney | Democratic | 1992 | Incumbent re-elected. | ||
| Charles Rangel | Democratic | 1970 | Incumbent re-elected. | ||
| José E. Serrano | Democratic | 1990 | Incumbent re-elected. | ||
| Eliot Engel | Democratic | 1988 | Incumbent re-elected. | ||
| Nita Lowey | Democratic | 1988 | Incumbent re-elected. | ||
| Sue Kelly | Republican | 1994 | Incumbent re-elected. | ||
| John E. Sweeney | Republican | 1998 | Incumbent re-elected. | ||
| Michael McNulty | Democratic | 1988 | Incumbent re-elected. | ||
| Maurice Hinchey | Democratic | 1992 | Incumbent re-elected. | ||
| John M. McHugh | Republican | 1992 | Incumbent re-elected. | ||
| Sherwood Boehlert | Republican | 1982 | Incumbent re-elected. | ||
| James T. Walsh | Republican | 1988 | Incumbent re-elected. | ||
| Thomas M. Reynolds | Republican | 1998 | Incumbent re-elected. | ||
| Jack Quinn | Republican | 1992 | Incumbent retired. Democratic gain. | ||
| Louise Slaughter | Democratic | 1986 | Incumbent re-elected. | ||
| Amo Houghton | Republican | 1986 | Incumbent retired. Republican hold. |
North Carolina
| District | Incumbent | Party | First elected | Result | Candidates |
| G. K. Butterfield | Democratic | 2004 | Incumbent re-elected. | ||
| Bob Etheridge | Democratic | 1996 | Incumbent re-elected. | ||
| Walter B. Jones Jr. | Republican | 1994 | Incumbent re-elected. | ||
| David Price | Democratic | 1986 1994 1996 | Incumbent re-elected. | ||
| Richard Burr | Republican | 1994 | Incumbent retired to run for U.S. Senator. Republican hold. | ||
| Howard Coble | Republican | 1984 | Incumbent re-elected. | ||
| Mike McIntyre | Democratic | 1996 | Incumbent re-elected. | ||
| Robin Hayes | Republican | 1998 | Incumbent re-elected. | ||
| Sue Myrick | Republican | 1994 | Incumbent re-elected. | ||
| Cass Ballenger | Republican | 1986 | Incumbent retired. Republican hold. | ||
| Charles H. Taylor | Republican | 1990 | Incumbent re-elected. | ||
| Mel Watt | Democratic | 1992 | Incumbent re-elected. | ||
| Brad Miller | Democratic | 2002 | Incumbent re-elected. |
North Dakota
| District | Incumbent | Party | First elected | Result | Candidates |
| Earl Pomeroy | Democratic-NPL | 1992 | Incumbent re-elected. |
Ohio
| District | Incumbent | Party | First elected | Result | Candidates |
| Steve Chabot | Republican | 1994 | Incumbent re-elected. | ||
| Robert J. Portman | Republican | 1993 | Incumbent re-elected. | ||
| Michael R. Turner | Republican | 2002 | Incumbent re-elected. | ||
| Michael G. Oxley | Republican | 1981 | Incumbent re-elected. | ||
| Paul E. Gillmor | Republican | 1988 | Incumbent re-elected. | ||
| Ted Strickland | Democratic | 1992 1994 1996 | Incumbent re-elected. | ||
| David L. Hobson | Republican | 1990 | Incumbent re-elected. | ||
| John A. Boehner | Republican | 1990 | Incumbent re-elected. | ||
| Marcia C. Kaptur | Democratic | 1982 | Incumbent re-elected. | ||
| Dennis J. Kucinich | Democratic | 1996 | Incumbent re-elected. | ||
| Stephanie Tubbs Jones | Democratic | 1998 | Incumbent re-elected. | ||
| Patrick J. Tiberi | Republican | 2000 | Incumbent re-elected. | ||
| Sherrod Brown | Democratic | 1992 | Incumbent re-elected. | ||
| Steven C. LaTourette | Republican | 1994 | Incumbent re-elected. | ||
| Deborah D. Pryce | Republican | 1992 | Incumbent re-elected. | ||
| Ralph S. Regula | Republican | 1972 | Incumbent re-elected. | ||
| Timothy J. Ryan | Democratic | 2002 | Incumbent re-elected. | ||
| Robert W. Ney | Republican | 1994 | Incumbent re-elected. |
Oklahoma
| District | Incumbent | Party | First elected | Result | Candidates |
| John Sullivan | Republican | 2002 | Incumbent re-elected. | ||
| Brad Carson | Democratic | 2000 | Incumbent retired to run for U.S. Senator. Democratic hold. | ||
| Frank Lucas | Republican | 1994 | Incumbent re-elected. | ||
| Tom Cole | Republican | 2002 | Incumbent re-elected. | ||
| Ernest Istook | Republican | 1992 | Incumbent re-elected. |
Oregon
| District | Incumbent | Party | First elected | Result | Candidates |
| David Wu | Democratic | 1998 | Incumbent re-elected. | ||
| Greg Walden | Republican | 1998 | Incumbent re-elected. | ||
| Earl Blumenauer | Democratic | 1996 | Incumbent re-elected. | ||
| Peter DeFazio | Democratic | 1986 | Incumbent re-elected. | ||
| Darlene Hooley | Democratic | 1996 | Incumbent re-elected. |
Pennsylvania
| District | Incumbent | Party | First elected | Result | Candidates |
| Bob Brady | Democratic | 1998 | Incumbent re-elected. | ||
| Chaka Fattah | Democratic | 1994 | Incumbent re-elected. | ||
| Phil English | Republican | 1994 | Incumbent re-elected. | ||
| Melissa Hart | Republican | 2000 | Incumbent re-elected. | ||
| John E. Peterson | Republican | 1996 | Incumbent re-elected. | ||
| Jim Gerlach | Republican | 2002 | Incumbent re-elected. | ||
| Curt Weldon | Republican | 1986 | Incumbent re-elected. | ||
| Jim Greenwood | Republican | 1992 | Incumbent retired. Republican hold. | ||
| Bill Shuster | Republican | 2001 | Incumbent re-elected. | ||
| Don Sherwood | Republican | 1998 | Incumbent re-elected. | ||
| Paul Kanjorski | Democratic | 1984 | Incumbent re-elected. | ||
| John Murtha | Democratic | 1974 | Incumbent re-elected. | ||
| Joe Hoeffel | Democratic | 1998 | Incumbent retired to run for U.S. Senator. Democratic hold. | ||
| Mike Doyle | Democratic | 1994 | Incumbent re-elected. | ||
| Pat Toomey | Republican | 1998 | Incumbent retired to run for U.S. Senator. Republican hold. | ||
| Joe Pitts | Republican | 1996 | Incumbent re-elected. | ||
| Tim Holden | Democratic | 1992 | Incumbent re-elected. | ||
| Tim Murphy | Republican | 2002 | Incumbent re-elected. | ||
| Todd Platts | Republican | 2000 | Incumbent re-elected. |
Rhode Island
| District | Incumbent | Party | First elected | Result | Candidates |
| Patrick Kennedy | Democratic | 1994 | Incumbent re-elected. | ||
| Jim Langevin | Democratic | 2000 | Incumbent re-elected. |
South Carolina
| District | Incumbent | Party | First elected | Result | Candidates |
| Henry Brown | Republican | 2000 | Incumbent re-elected. | ||
| Joe Wilson | Republican | 2001 (special) | Incumbent re-elected. | ||
| Gresham Barrett | Republican | 2002 | Incumbent re-elected. | ||
| Jim DeMint | Republican | 1998 | Incumbent retired to run for U.S. Senator. Republican hold. | ||
| John Spratt | Democratic | 1982 | Incumbent re-elected. | ||
| Jim Clyburn | Democratic | 1992 | Incumbent re-elected. |
South Dakota
| District | Incumbent | Party | First elected | Result | Candidates |
| Stephanie Herseth | Democratic | 2004 (special) | Incumbent re-elected. |
Tennessee
| District | Incumbent | Party | First elected | Result | Candidates |
| William L. Jenkins | Republican | 1996 | Incumbent re-elected. | ||
| Jimmy Duncan Jr. | Republican | 1998 | Incumbent re-elected. | ||
| Zach Wamp | Republican | 1994 | Incumbent re-elected. | ||
| Lincoln Davis | Democratic | 2002 | Incumbent re-elected. | ||
| Jim Cooper | Democratic | 1982 1994 2002 | Incumbent re-elected. | ||
| Bart Gordon | Democratic | 1984 | Incumbent re-elected. | ||
| Marsha Blackburn | Republican | 2002 | Incumbent re-elected. | ||
| John Tanner | Democratic | 1988 | Incumbent re-elected. | ||
| Harold Ford Jr. | Democratic | 1996 | Incumbent re-elected. |
Utah
| District | Incumbent | Party | First elected | Result | Candidates |
| Rob Bishop | Republican | 2002 | Incumbent re-elected. | ||
| Jim Matheson | Democratic | 2000 | Incumbent re-elected. | ||
| Chris Cannon | Republican | 1996 | Incumbent re-elected. |
Vermont
| District | Incumbent | Party | First elected | Result | Candidates |
| Bernie Sanders | Independent | 1990 | Incumbent re-elected. |
Virginia
| District | Incumbent | Party | First elected | Result | Candidates |
| Jo Ann Davis | Republican | 2000 | Incumbent re-elected. | ||
| Ed Schrock | Republican | 2000 | Incumbent retired. Republican hold. | ||
| Bobby Scott | Democratic | 1992 | Incumbent re-elected. | ||
| Randy Forbes | Republican | 2001 | Incumbent re-elected. | ||
| Virgil Goode | Republican | 1996 | Incumbent re-elected. | ||
| Bob Goodlatte | Republican | 1992 | Incumbent re-elected. | ||
| Eric Cantor | Republican | 2000 | Incumbent re-elected. | ||
| Jim Moran | Democratic | 1990 | Incumbent re-elected. | ||
| Rick Boucher | Democratic | 1982 | Incumbent re-elected. | ||
| Frank Wolf | Republican | 1980 | Incumbent re-elected. | ||
| Thomas M. Davis | Republican | 1994 | Incumbent re-elected. |
Washington
All seven incumbents who ran for re-election, none of whom faced viable challengers, were returned to Congress. None received less than 60% of the vote, and one received over 80%. In addition, the two seats vacated by retiring Republicans were both reclaimed by Republicans despite Democratic hopes to gain at least one seat in the vulnerable 8th district.| District | Incumbent | Party | First elected | Result | Candidates |
| Jay Inslee | Democratic | 1992 1994 1998 | Incumbent re-elected. | ||
| Rick Larsen | Democratic | 2000 | Incumbent re-elected. | ||
| Brian Baird | Democratic | 1998 | Incumbent re-elected. | ||
| Doc Hastings | Republican | 1994 | Incumbent re-elected. | ||
| George Nethercutt | Republican | 1994 | Incumbent retired to run for U.S. Senator. Republican hold. | ||
| Norm Dicks | Democratic | 1976 | Incumbent re-elected. | ||
| Jim McDermott | Democratic | 1988 | Incumbent re-elected. | ||
| Jennifer Dunn | Republican | 1992 | Incumbent retired. Republican hold. | ||
| Adam Smith | Democratic | 1996 | Incumbent re-elected. |
West Virginia
| District | Incumbent | Party | First elected | Result | Candidates |
| Alan Mollohan | Democratic | 1982 | Incumbent re-elected. | ||
| Shelley Capito | Republican | 2000 | Incumbent re-elected. | ||
| Nick Rahall | Democratic | 1976 | Incumbent re-elected. |
Wisconsin
| District | Incumbent | Party | First elected | Result | Candidates |
| Paul Ryan | Republican | 1998 | Incumbent re-elected. | ||
| Tammy Baldwin | Democratic | 1998 | Incumbent re-elected. | ||
| Ron Kind | Democratic | 1996 | Incumbent re-elected. | ||
| Jerry Kleczka | Democratic | 1984 | Incumbent retired. Democratic hold. | ||
| Jim Sensenbrenner | Republican | 1978 | Incumbent re-elected. | ||
| Tom Petri | Republican | 1979 | Incumbent re-elected. | ||
| Dave Obey | Democratic | 1969 | Incumbent re-elected. | ||
| Mark Green | Republican | 1998 | Incumbent re-elected. |
Wyoming
| District | Incumbent | Party | First elected | Result | Candidates |
| Barbara Cubin | Republican | 1994 | Incumbent re-elected. |
Non-voting delegates
| District | Incumbent | Party | Elected | Status | Result |
| Eni Faleomavaega | Democratic | 1988 | Incumbent re-elected. | ||
| Eleanor Holmes Norton | Democratic | 1990 | Incumbent re-elected. | ||
| Madeleine Bordallo | Democratic | 2002 | Incumbent re-elected. | ||
| Aníbal Acevedo Vilá | Popular Democratic/ Democratic | 1992 | Incumbent retired to run for Governor of Puerto Rico. New Progressive gain. Republican gain. | ||
| Donna Christensen | Democratic | 1996 | Incumbent re-elected. |