South Dakota's 18th legislative district

South Dakota's 18th legislative district is one of 35 districts in the South Dakota Legislature. Each district is represented by 1 senator and 2 representatives. In the Senate, it has been represented by Republican Jean Hunhoff since 2021. In the House, it has been represented by Republicans Julie Auch since 2023 and Mike Stevens since 2021.

Geography
The district is located within Clay and Yankton County in southeastern South Dakota. Its largest city is Yankton.