PolitiFinder

2020 South Dakota U.S. Senate Election

South Dakota · 2 candidates · See every 2020 U.S. Senate race

Who won the 2020 South Dakota U.S. Senate Election?

Mike Rounds won the 2020 South Dakota U.S. Senate Election. Mike Rounds received 276,232 popular votes (65.74%). The main challenger was Dan Ahlers (34.26%).

See the full head-to-head between Rounds and Ahlers

Rounds +31.5 pts · won by 132,245 votes
Mike RoundsRepublicanWINNER65.74%
276,232 votes
Dan AhlersDemocratic34.26%
143,987 votes
Popular-vote totals for U.S. Senate elections come from the MIT Election Data and Science Lab (1976–2024).

Data last verified July 28, 2026.