1980 United States Senate election in Wisconsin

1980 United States Senate election in Wisconsin

November 4, 1980
 
Nominee Bob Kasten Gaylord Nelson
Party Republican Democratic
Popular vote 1,106,311 1,065,487
Percentage 50.19% 48.34%

County results
Kasten:      50–60%      60–70%
Nelson:      50–60%      60–70%      70–80%

U.S. senator before election

Gaylord Nelson
Democratic

Elected U.S. Senator

Bob Kasten
Republican

The 1980 United States Senate election in Wisconsin was held on November 4, 1980. Incumbent Democratic U.S. Senator Gaylord Nelson ran for re-election to a fourth term but was defeated by Bob Kasten, a Republican.