2024 United States Senate elections

The 2024 United States Senate elections were held on November 5, 2024. Regularly scheduled elections were held for 33 out of the 100 seats in the U.S. Senate, and special elections were held in California and Nebraska. U.S. senators are divided into three classes whose six-year terms are staggered so that a different class is elected every two years. Class 1 senators faced election in 2024. Republicans flipped four Democratic-held seats, regaining a Senate majority for the first time in four years, and the most gains for either party since 2014. Republicans successfully defended all of their own seats for the first time since 2014. This was the first time since 1980 that Republicans flipped control of a chamber of Congress in a presidential year. A total of 25 U.S. senators (14 Democrats, nine Republicans, and two independents) sought re-election in 2024, while seven senators declined to seek re-election. In addition, Democrats Sen. Laphonza Butler of California and Sen. George Helmy of New Jersey – each of whom had been appointed to their respective Senate seats – did not seek election in 2024. Concurrent with the 2024 regular Senate elections, two special Senate elections took place: one in California, to fill the final two months of Dianne Feinstein's term following her death in September 2023; and one in Nebraska, to fill the remaining two years of Ben Sasse's term following his resignation in January 2023. Republicans won control of the U.S. Senate by flipping an open independent-held seat in West Virginia; defeating Democratic incumbents in Montana, Ohio, and Pennsylvania; and retaining all the seats they had previously held. Democrats flipped a seat in Arizona from an Independent who caucused with the Democrats. Democratic candidates were elected in Arizona, Michigan, Nevada, and Wisconsin, despite Trump having won those states. No Republican won in a state that Kamala Harris carried in the presidential election.