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2026 South Dakota Senate election – District 18

Nov 3, 2026

IncumbentLauren Nelson Republican

General election

November 3, 2026

Kay Swihart Democrat
Republican Nominee TBD

Democratic primary

In progress

✓Kay SwihartUnopposed

Republican primary

Jean Hunhoff
former senator from this district (2021–2025)
Lauren Nelson
incumbent senator