1954 United States Senate elections

The 1954 United States Senate elections was a midterm election in the first term of Dwight D. Eisenhower's presidency. The 32 Senate seats of Class 2 were contested in regular elections, and six special elections were held to fill vacancies. Eisenhower's Republican party lost a net of two seats to the Democratic opposition. This small change was just enough to give Democrats control of the chamber with the help of the Independent (Wayne Morse of Oregon) who at the start of this Congress in January 1955 agreed to caucus with them; he later officially joined the party in April 1955.

A contribution to the Republican reversal was backlash against GOP-driven McCarthyism and the numerous controversies it spawned, including the Army–McCarthy hearings. Other factors included a comment made in Detroit by Defense Secretary Charles Wilson, former president of General Motors, equating unemployed auto workers with "lazy kennel dogs who sit... and yell."

However, it has been pointed out that losses in the midterm election were considerably less than the White House party generally faces in the midterm elections, and this has been attributed to the overall popularity of President Eisenhower, who participated in the campaign along with Vice-President Richard Nixon and other members of the cabinet.

The elections resulted in a divided government that continued to the end of Eisenhower's presidency and a Democratic majority that would last until 1981. As of 2022, this is the last Senate election cycle in which a state (both Nebraska and North Carolina) had to hold three simultaneous elections (two special elections and one regular election) due to the near-simultaneous deaths of both incumbent Senators.