The 1984 United States House of Representatives elections was an election for the United States House of Representatives on November 6, 1984, to elect members to serve in the 99th United States Congress. They coincided with the re-election of President Ronald Reagan in a landslide. This victory also yielded gains for Reagan's Republican Party in the House, where they picked up a net of sixteen seats from the Democratic Party. Despite Reagan's extremely large electoral victory, the Democrats nonetheless retained a commanding majority in the House and actually gained seats in the Senate. These elections were the last until 2020 when a member of a political party other than the Democrats, Republicans, or an independent had one or more seats in the chamber. This would be the last time for eight years that the Democrats experienced a net loss of seats in the House.

Overall results

411 incumbent members sought reelection, but 3 were defeated in primaries and 16 defeated in the general election for a total of 392 incumbents winning.

Retiring incumbents

Twenty-two representatives retired. Sixteen of those seats were held by the same party, six seats changed party.

Democrats

Nine Democrats retired. Four of those seats were held by Democrats and five were won by Republicans.

Democratic held

Republican gain

Republicans

Twelve Republicans retired. Eleven of those seats were held by Republicans and one was won by a Democrat.

Republican held

Democratic gain

Defeated incumbents

In primary election

Democrats

Three Democrats lost renomination.

In the general election

Democrats

Thirteen Democrats lost re-election.

Republicans

Three Republicans lost re-election.

Special elections

There were three special elections to the 98th Congress in 1984, two of which were held on the same day as the general election for the next term. Elections are sorted here by date then district.

Alabama

Alaska

Arizona

Arkansas

California

Colorado

Connecticut

Delaware

Florida

Georgia

Hawaii

Idaho

Illinois

Indiana

Iowa

Kansas

Kentucky

Louisiana

Maine

Maryland

Massachusetts

Michigan

Minnesota

Mississippi

Missouri

Montana

Nebraska

Nevada

New Hampshire

New Jersey

New Mexico

New York

North Carolina

North Dakota

Ohio

Oklahoma

Oregon

Pennsylvania

Rhode Island

South Carolina

South Dakota

Tennessee

Texas

Utah

Vermont

Virginia

Washington

West Virginia

Wisconsin

! Wisconsin's 1st congressional district ✅ Les Aspin (Democratic) 56.2% Peter Jansson (Republican) 43.8% ! Wisconsin's 2nd congressional district ✅ Robert Kastenmeier (Democratic) 63.7% Albert Lee Wiley Jr. (Republican) 36.3% ! Wisconsin's 3rd congressional district ✅ Steve Gunderson (Republican) 68.4% Charles F. Dahl (Democratic) 31.6% ! Wisconsin's 4th congressional district ✅ Jerry Kleczka (Democratic) 66.6% Robert V. Nolan (Republican) 32.8% K. Rick Kissell (Labor) 0.6% ! Wisconsin's 5th congressional district ✅ Jim Moody (Democratic) 98.1% William C. Breihan (Socialist Workers) 1.9% ! Wisconsin's 6th congressional district ✅ Tom Petri (Republican) 75.8% David L. Iaquinta (Democratic) 24.2% ! Wisconsin's 7th congressional district ✅ Dave Obey (Democratic) 61.2% Mark G. Michaelsen (Republican) 38.8% ! Wisconsin's 8th congressional district ✅ Toby Roth (Republican) 67.9% Paul Willems (Democratic) 30.8% Gary L. Barnes (Libertarian) 0.8% Cornelius D. Van Handel (Labor) 0.4% ! Wisconsin's 9th congressional district ✅ Jim Sensenbrenner (Republican) 73.4% John Krause (Democratic) 26.1% Stephen K. Hauser (Constitution) 0.5%

Wyoming

Non-voting delegates

! American Samoa at-large ✅ Fofō Iosefa Fiti Sunia (Democratic) 65.2% Soli Lumoelogo (Independent) 34.8% ! District of Columbia at-large ✅ Walter Fauntroy (Democratic) 95.6% ! Guam at-large ✅ Ben Blaz (Republican) 50.3% Antonio Borja Won Pat (Democratic) 49.2% ! Puerto Rico at-large ✅ Jaime Fuster (PPD/Democratic) 48.5% Nelson Famadas (PNP/Democratic) 45.4% Francisco Catalá (PIP) 3.8% Angel Viera Martinez (PRP) 2.3% ! U.S. Virgin Islands at-large ✅ Ron de Lugo (Democratic) 73.6% Janet Watlington (Independent) 25.6%