The 1964 United States Senate election in Florida was held on November 3, 1964. Incumbent Democratic U.S. Senator Spessard Holland was re-elected to a fourth term in office, defeating J. Brailey Oldham in the primary and Republican Claude R. Kirk Jr. in the general election. Kirk would go on to be elected governor in 1966. This was the first time since 1950 that a Republican won a county in a U.S. Senate race in Florida.
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Text from the Wikipedia article “1964 United States Senate election in Florida”, available under CC BY-SA 4.0.