Walworth County Courthouse

The Walworth County Courthouse, located at 4304 4th Ave. in Selby, South Dakota, is a courthouse for Walworth County, South Dakota which was built in 1911. It was listed on the National Register of Historic Places in 1999.

It is a three-story structure built of brick, sandstone, and concrete. Its design is "utilitarian" yet includes Classical Revival details.

The building was designed by the Fall River Company, a Hot Springs-based architecture firm operated by architect John P. Eisentraut.

A jail building completed in 1911 is also included in the listing. Its design is Late Victorian Romanesque in style.