IncumbentDusty Johnson Republican
2026 South Dakota's at-large congressional district election
- Marty Jackley Republican
South Dakota Attorney General (2009–2019, 2023–present) and candidate for governor in 2018
- Nikki Gronli Democrat
former South Dakota state director for USDA Rural Development (2022–2025) and former vice chair of the South Dakota Democratic Party
- Nicole Gronli Democrat
Independents:
Democratic primary
former South Dakota state director for USDA Rural Development (2022–2025) and former vice chair of the South Dakota Democratic Party
Republican primary
South Dakota Attorney General (2009–2019, 2023–present) and candidate for governor in 2018
small business owner and real estate investor