2026 United States Senate election in South Dakota

For related races, see 2026 United States Senate elections.

The 2026 United States Senate election in South Dakota will be held on November 3, 2026, to elect a member of the United States Senate to represent the state of South Dakota. Two-term Republican Mike Rounds was re-elected in 2020 with 65.8% of the vote and has not stated whether he will run for re-election.

2026 United States Senate election in South Dakota

← 2020 November 3, 2026 2032 →

Party Republican Democratic

Incumbent U.S. senator Mike Rounds Republican

Republican primary

Candidates

Filed Paperwork

• William Beauford^[1]

Publicly expressed interest

• Mike Rounds, incumbent U.S. Senator (2015–present)^[2]

Democratic primary

Candidates

Declared

• Julian Beaudion, former South Dakota state trooper, activist, and businessman^[3]

Independents

Candidates

Declared

• Brian Bengs, U.S. Navy and Air Force veteran, former Northern State University political science professor, and Democratic nominee for U.S. Senate in 2022^[4]

General election

Predictions

Source	Ranking	As of
Inside Elections[5]	Solid R	January 17, 2025
The Cook Political Report[6]	Solid R	February 13, 2025
Sabato's Crystal Ball[7]	Safe R	February 13, 2025
Race To The WH[8]	Safe R	April 30, 2025