1926 United States Senate elections

The 1926 United States Senate elections were elections for the United States Senate that occurred in the middle of Republican President Calvin Coolidge's second term. The 32 seats of Class 3 were contested in regular elections, and special elections were held to fill vacancies. The Republican majority was reduced by seven seats.

Retirements
One Republican and one Democrat retired instead of seeking re-election.

Defeats
Ten Republicans sought re-election but lost in the primary or general election. One Republican sought election to finish the unexpired term but lost in the general election and one Republican sought election to finish the unexpired term and election to a full term but lost in both the special election and the regular election.

Death
One Republican died on August 23, 1926, and his seat remained vacant until the election.

Before the elections
At the beginning of 1926.

Special elections during the 69th Congress
In these special elections, the winners were seated during 1926 or before March 4, 1927; ordered by election date.

Elections leading to the 70th Congress
In these general elections, the winners were elected for the term beginning March 4, 1927; ordered by state.

All of the elections involved the Class 3 seats.

Closest races
Twelve races had a margin of victory under 10%:

Indiana
There were 2 elections in Indiana due to the October 14, 1925, death of Democrat Samuel M. Ralston.

Indiana (special)
Republican Arthur Raymond Robinson was appointed to continue Ralston's term, pending the special election, which he then won.

Missouri
There were 2 elections on the same day for the same seat, due to the May 16, 1925, death of Republican Selden P. Spencer.

Republican George H. Williams was appointed May 25, 1925, to continue the term, epending a special election. Williams ran in both the special election to finish the term and the regular election to the next term, but lost both races to Democrat Harry B. Hawes.

North Dakota
There were two elections due to the June 22, 1925, death of one-term Republican Edwin F. Ladd. Republican Gerald Nye was appointed November 14, 1925, to continue the term, pending a special election. Nye later won the June 1926 special election to finish the term and the November 1926 general election to the next term.

North Dakota (special)
Nye was elected on the Nonpartisan League ticket, but served as a Republican.