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34 of the 100 seats in the United States Senate 51 seats needed for a majority | ||||||||||||||||||||||||||||||||||||||||
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 Results of the elections (excl. North Dakota): Republican gain Democratic hold Republican hold No election | ||||||||||||||||||||||||||||||||||||||||
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The 1960 United States Senate elections coincided with the election of John F. Kennedy as president on November 8, 1960. The 33 seats of Class 2 were contested in regular elections. A special election was also held on June 28, 1960, for a mid-term vacancy in North Dakota where Democrats flipped a seat to expand their majority to 66–34. As Majority Leader Lyndon Johnson was elected Vice President, Mike Mansfield became the new majority leader.
The Republicans gained two seats at the expense of the Democrats. However, Republican Senator-elect Edwin Keith Thomson of Wyoming died December 9, 1960, and was replaced by appointee Democratic John J. Hickey at the beginning of the Congress, reducing Republican gains to one seat. However, this was canceled out by a 1961 special election where Republican John Tower flipped Johnson's Senate seat. The Democrats nonetheless retained a commanding lead in the Senate with 64 seats to 36.
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