Contact South Dakota Senators

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Mike Rounds

Contact senator Mike Rounds of South Dakota. Contact information for Mike Rounds includes email address, phone number, and mailing address.

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John Thune

Contact senator John Thune of South Dakota. Contact information for John Thune includes email address, phone number, and mailing address.

South Dakota

South Dakota became the 40th state in the Union on November 2, 1889. The state’s first two senators, Richard F. Pettigrew and Gideon C. Moody, were sworn into office on December 2, 1889. South Dakota’s longest-serving senator is Karl Mundt, who served from 1948 to 1973. Among those who rose to leadership positions are Tom Daschle, who served as Democratic leader, and John Thune, who served as Republican Conference chairman and currently serves as Republican whip.