The 1936 United States Senate elections coincided with the reelection of President Franklin D. Roosevelt. The 32 seats of Class 2 were contested in regular elections, and special elections were held to fill vacancies. The Great Depression continued and voters backed progressive candidates favoring Roosevelt's New Deal in races across the country. The Democrats gained 5 net seats during the election, and in combination with Democratic and Farmer–Labor interim appointments and the defection of George W. Norris from the Republican Party to become independent, the Republicans were reduced to 16 seats. Democrats gained a further two seats due to mid-term vacancies. The Democrats' 77 seats and their 62-seat majority remain their largest in history. This was the last of four consecutive election cycles where Republicans suffered losses due to the ongoing effects of the Great Depression. This was also the last Senate election cycle until 2012 in which a Democratic candidate who won two terms also made net gains in the Senate on both occasions (although Roosevelt won a third term and fourth term, he lost Senate seats on both occasions). Additionally, this is the last time any party held three-fourths of all Senate seats.

Gains, losses, and holds

Retirements

One Republican, one Farmer-Labor, and five Democrats retired instead of seeking re-election.

Defeats

Six Republicans and one Democrat sought re-election but lost in the primary or general election.

Death

One Democrat died on July 16, 1936, and his seat remained vacant until the election.

Independent gain

One Republican won re-election as an Independent.

Post-election changes

Change in composition

Before the elections

After the April 1936 special election.

Result of the elections

Beginning of the next Congress

Race summaries

Elections during the 74th Congress

In these special elections the winners were seated once they qualified; ordered by election date.

Elections leading to the 75th Congress

In these general elections, the winners were elected for the term beginning January 3, 1937; ordered by state. All of the elections involved the Class 2 seats.

Closest races

Eleven races had a margin of victory under 10%: There is no tipping point state.

Alabama

Arkansas

Colorado

Delaware

Florida (special)

There were two special elections in Florida, due to the May 8, 1936, death of four-term Democrat Park Trammell and the June 17, 1936, death of five-term Democrat Duncan U. Fletcher.

Florida (special, class 1)

Democrat Scott M. Loftin was appointed May 26, 1936, to continue the term, pending a special election. Primaries were held August 11, 1936. Andrews would be re-elected once and serve until his death September 18, 1946.

Florida (special, class 3)

Democrat William Luther Hill was appointed July 1, 1936, to continue the term, pending a special election. Democrat Claude Pepper, who had lost to Trammell in 1934 won this election. Pepper would be re-elected twice and serve until he lost renomination in 1950. He would later be elected to the U.S. House of Representatives and serve there for 26 years.

Georgia

Idaho

Illinois

Iowa

Iowa (regular)

Iowa (special)

Kansas

Kentucky

Louisiana

Louisiana (regular)

Louisiana (special)

Democrat Rose McConnell Long was elected April 21, 1936, to finish the term to which she was appointed on January 31, 1936. She was not a candidate, however, to the next term on November 3, 1936, see above.

Maine

Massachusetts

Michigan

Minnesota

There were 2 elections to the same seat on the same day due to the December 22, 1935, death of two-term Republican Thomas D. Schall.

Minnesota (special)

The election was held to fill the vacancy in the seat formerly held by Thomas D. Schall for the final two months of Schall's unexpired term. Governor Floyd B. Olson had appointed Elmer Benson to fill the seat in 1935, but this appointment was temporary and subject to a special election held in the next general election year thereafter—1936. Benson opted to run for governor instead of running for election to continue for the remainder of the term. No special primaries were held for the special election, and, among Minnesota's three major parties, only the Republican Party of Minnesota officially fielded a candidate—Guy V. Howard. Regardless of the absence of Farmer-Labor and Democratic nominees, Howard nevertheless faced a great degree of competition from independent candidates Nathaniel J. Holmberg, Andrew Olaf Devold, and John G. Alexander. The candidates were: Howard was not a candidate for the next term, and served only until January 1937.

Minnesota (regular)

The election to the next term was won by Farmer–Labor congressman Ernest Lundeen.

Mississippi

Montana

Nebraska

New Hampshire

New Jersey

New Mexico

There were 2 elections, due to the May 6, 1935, death of two-term Republican Bronson M. Cutting.

New Mexico (special)

Democratic former-Congressman Dennis Chavez had been Cutting's opponent in 1934. On May 11, 1935, after Cutting's death, Chavez was then appointed to continue Cutting's term, pending a special election which he then won. Chavez would be re-elected four more times and serve until his death in 1962.

New Mexico (regular)

First-term Democrat Carl Hatch was easily re-elected. Hatch would be re-elected once and serve until his 1948 retirement.

North Carolina

Oklahoma

Oregon

Rhode Island

South Carolina

South Dakota

Tennessee

Texas

Virginia

West Virginia

Wyoming