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 County results Bellmon: 40-50% 50-60% 60-70% 70-80% Monroney: 40–50% 50–60% 60–70% | |||||||||||||||||
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| Elections in Oklahoma |
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 Government |
The 1968 United States Senate election in Oklahoma was held November 3, 1968. Incumbent Democratic U.S. Senator Mike Monroney was running for re-election to a fourth term, but was defeated by Republican Henry Bellmon. This is the last time that a Senator from Oklahoma lost re-election.
This election was the first time since 1942 that a Republican won a United States Senate election in Oklahoma and the first time since 1920 that a Republican won a United States Senate election in Oklahoma for this seat.