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33 of the 100 seats in the United States Senate 51 seats needed for a majority | ||||||||||||||||||||||||||||||||||||||||
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Results of the elections: Democratic gain Republican gain Democratic hold Republican hold No election | ||||||||||||||||||||||||||||||||||||||||
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The 1984 United States Senate elections were held on November 6, with the 33 seats of Class 2 contested in regular elections. They coincided with the landslide re-election of President Ronald Reagan in the presidential election. In spite of the lopsided presidential race, Reagan's Republican Party suffered a net loss of two Senate seats to the Democrats, although it retained control of the Senate with a reduced 53–47 majority.
Democrats defeated incumbents in Illinois and Iowa, and won an open seat in Tennessee, while Republicans defeated an incumbent in Kentucky. This was the first time since 1972 that Democrats gained Class 2 Senate seats.