1964 United States Senate election in North Dakota

The 1964 U.S. Senate election for the state of North Dakota was held November 3, 1964. The incumbent, Dem-NPL Senator Quentin Burdick, sought and received re-election to his second term, defeating Republican candidate Thomas S. Kleppe, who later became the United States Secretary of the Interior.

Only Burdick filed as a Dem-NPLer, and the endorsed Republican candidate was Thomas S. Kleppe, who served two terms as a Representative for North Dakota's second congressional district from 1967 to 1971. Burdick and Kleppe won the primary elections for their respective parties.