2002 United States Senate election in South Dakota
November 5, 2002
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County results Johnson: 50–60% 60–70% 70–80% 80–90% >90% Thune: 40–50% 50–60% 60–70% 70–80% | |||||||||||||||||
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| Elections in South Dakota |
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The 2002 United States Senate election in South Dakota was held on November 5, 2002. Incumbent Democratic U.S. Senator Tim Johnson narrowly won re-election to a second term over future senator and Senate Majority Leader John Thune by a margin of 524 votes, or 0.15%. This made the election the closest race of the 2002 Senate election cycle.
This was one of the four Democratic-held Senate seats up for election in a state that George W. Bush won in the 2000 presidential election. Thune has held South Dakota's other Senate seat since 2005, and became the Senate Majority Leader after the 2024 elections.