1978 United States Senate election in South Dakota

The 1978 United States Senate election in South Dakota was held on November 7, 1978. Incumbent Democratic U.S. Senator James Abourezk did not run for re-election to a second term, but was succeeded by his political rival, Republican U.S. Representative Larry Pressler.

Candidates

 * Don Barnett, former Mayor of Rapid City
 * Kenneth D. Stofferahn, farmer and former Republican State Representative from Humboldt

Candidates

 * Larry Pressler, U.S. Representative from Humboldt
 * Ron Williamson, businessman from Sioux Falls