The 1870–71 United States House of Representatives elections were held on various dates in various states between June 6, 1870, and October 6, 1871. Each state set its own date for its elections to the House of Representatives before or after the first session of the 42nd United States Congress convened on March 4, 1871. They occurred in the middle of President Ulysses S. Grant's first term. Elections were held for all 243 seats, representing 37 states.

With Grant's administration rocked by a number of scandals (including a shady deal for gold speculation that led to a crash in the market and several business deals that saw high-ranking governmental officials gain kickbacks) and Reconstruction winding down, his Republican Party lost seats to the opposition Democratic Party but retained an overall majority. Also, since white-supremacist governments controlled by the Democratic Party were reestablishing themselves in some portions of the South, the Democrats were able to make huge gains in this election.

1870–71 United States House of Representatives elections

Election summaries

The previous election included 5 Conservatives

Election dates

In 1845, Congress passed a law providing for a uniform nationwide date for choosing Presidential electors. This law did not affect election dates for Congress, which remained within the jurisdiction of State governments, but over time, the States moved their congressional elections to this date as well. In 1870, there remained 12 States that held elections before Election Day, and 4 that held it after at this time:

1870–71 United States House of Representatives elections

Early elections: December 1, 1869: Mississippi (Mississippi was a special case, having held elections for both the 41st Congress upon readmission and for the 42nd Congress on the same day) June 6: Oregon August 4: North Carolina September 6: Vermont September 12: Maine October 11: Indiana, Iowa, Nebraska, Ohio, Pennsylvania October 25: West Virginia November 1: South Carolina Late elections: March 14, 1871: New Hampshire April 4, 1871: Connecticut August 6, 1871: Montana Territory September 6, 1871: California October 6, 1871: Texas

1870–71 United States House of Representatives elections

Special elections

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! |- ! |- ! |- ! | Benjamin F. Hopkins | | Republican | 1866 | | Incumbent died January 1, 1870.New member elected February 15, 1870.Republican hold. | nowrap |

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Alabama

Arizona Territory

See Non-voting delegates, below.

Arkansas

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! | Logan Roots | | Republican | 1868 | | Incumbent defeated.New member elected.Democratic gain. | nowrap | |- ! | Anthony A.C. Rogers | | Democratic | 1868 | | Incumbent defeated.New member elected.Republican gain. | nowrap | |- ! | Thomas Boles | | Republican | 1868 | | Incumbent defeated.New member elected.Liberal Republican gain. | nowrap |

|}

California

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! | Samuel Beach Axtell | | Democratic | 1867 | | Incumbent retired.New member elected.Republican gain. | nowrap | |- ! | Aaron Sargent | | Republican | 1868 | Incumbent re-elected. | nowrap | |- ! | James A. Johnson | | Democratic | 1867 | | Incumbent retired.New member elected.Republican gain. | nowrap |

|}

Colorado Territory

See Non-voting delegates, below.

Connecticut

Dakota Territory

See Non-voting delegates, below.

Delaware

District of Columbia

See Non-voting delegates, below.

Florida

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! | Charles M. Hamilton | | Republican | 1868 | | Incumbent retired.New member elected.Republican hold. | nowrap |

|}

Niblack subsequently successfully challenged Walls's election and was seated from Florida's at-large district on January 29, 1873.

Georgia

Idaho Territory

See Non-voting delegates, below.

Illinois

Indiana

Iowa

Kansas

Kentucky

Louisiana

Maine

Maryland

Massachusetts

Michigan

Minnesota

Missouri

Montana Territory

See Non-voting delegates, below.

Nebraska

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! | John Taffe | | Republican | 1866 | Incumbent re-elected. | nowrap |

|}

Nevada

New Hampshire

New Jersey

New York

North Carolina

New Mexico Territory

See Non-voting delegates, below.