1918 United States Senate elections

1918 United States Senate elections

← 1916 November 5, 1918[a] 1920 →
38 of the 96 seats in the United States Senate 49 seats needed for a majority
Majority party Minority party   Leader Henry Cabot Lodge[b] Oscar Underwood Party Republican Democratic Leader since March 4, 1919 April 27, 1920 Leader's seat Massachusetts Alabama Seats before 43 53 Seats after 49 47 Seat change 6 6 Seats up 17 24 Seats won 23 18
Results of the elections:      Democratic gain      Democratic hold      Republican gain      Republican hold      No election
Majority Leader before election Thomas S. Martin (as Conference Chairman) Democratic Elected Majority Leader Henry Cabot Lodge (Unofficial) Republican

The 1918 United States Senate elections were held throughout 1918,^[a] the midpoint of Woodrow Wilson's second term as president. This was the first election since the enactment of the Seventeenth Amendment that all 32 Class 2 Senators were subject to direct or popular election, making them the final class under the old system of being selected by state legislatures. Special elections were also held to fill vacancies.

Republicans gained a slim 2-seat control after picking up a net 6 seats. This came after an April 1918 special election where they flipped a seat in Wisconsin.
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