The 1918 United States Senate election in South Dakota took place on November 5, 1918. Incumbent Republican Senator
Thomas Sterling sought re-election in his first popular election. He defeated former Governor
Frank M. Byrne in the Republican primary and then faced former State Representative Orville Rinehart, the
1916 Democratic nominee for Governor, in the general election. Sterling defeated Rinehart, along with independent candidate W. T. Rafferty, by a wide margin to win re-election.
Democratic primary
Candidates
Orville V. Rinehart, former State Representative from
Pennington County,
1916 Democratic nominee for Governor[1]
James Coffey, Internal Revenue Collector for North and South Dakota[2]
The 1918 United States Senate election in South Dakota took place on November 5, 1918. Incumbent Republican Senator
Thomas Sterling sought re-election in his first popular election. He defeated former Governor
Frank M. Byrne in the Republican primary and then faced former State Representative Orville Rinehart, the
1916 Democratic nominee for Governor, in the general election. Sterling defeated Rinehart, along with independent candidate W. T. Rafferty, by a wide margin to win re-election.
Democratic primary
Candidates
Orville V. Rinehart, former State Representative from
Pennington County,
1916 Democratic nominee for Governor[1]
James Coffey, Internal Revenue Collector for North and South Dakota[2]