United States House of Representatives elections, 1966

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November 8, 1966

1968 →

All 435 seats to the United States House of Representatives
218 seats were needed for a majority

	Majority party	Minority party

Leader	John McCormack	Gerald Ford
Party	Democratic	Republican
Leader's seat	Massachusetts-12th	Michigan-5th
Last election	295 seats	140 seats
Seats won	248	187
Seat change	47	47
Popular vote	26,934,136	25,521,157
Percentage	50.9%	48.2%
Swing	6.2%	5.8%

Speaker before election

John McCormack
Democratic

Elected Speaker

John McCormack
Democratic

The 1966 United States House of Representatives elections was an election for the United States House of Representatives in 1966 which occurred in the middle of President Lyndon Johnson's second term. As the Vietnam War continued to escalate and race riots exploded in cities across the country, Johnson's popularity had fallen, and the opposition Republican Party was able to gain a net of 47 seats from Johnson's Democratic Party, which nonetheless maintained a clear majority in the House. This was also the first election that occurred after the Voting Rights Act of 1965 became law.

Source: Election Statistics - Office of the Clerk

¹ One vacancy due to refusal of House to seat Adam Clayton Powell, Jr. (D-New York)

Florida redistricted to adjust for demographic changes; in addition to minor boundary changes a district was removed from northern Florida, and Broward County was broken out into its own district.

Indiana redistricted for this election, and boundary changes forced two Republican incumbents into the same district while creating a new district that was won by another Republican.

Maryland redistricted its at-large district into an 8th district around Montgomery County, managing to adjust boundaries so no existing incumbents were displaced.

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