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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 Republican John Thune by a margin of 524 votes, or 0.15%. This made the election the closest race of the 2002 Senate election cycle.
Thune later narrowly won South Dakota's other U.S. Senate seat in 2004, and was re-elected in 2010, 2016, and 2022 in uncompetitive elections.