| Walworth County Courthouse | |
| Coordinates: | 45.5069°N -100.0342°W |
| Built: | 1911 |
| Architect: | Fall River Company |
| Builder: | Gary Construction |
| Architecture: | Classical Revival, Romanesque |
| Added: | June 3, 1999 |
| Area: | less than one acre |
| Mpsub: | County Courthouses of South Dakota MPS |
| Refnum: | 99000680 |
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.[1]
The building was designed by the Fall River Company, a Hot Springs-based architecture firm operated by architect John P. Eisentraut.[1]
A jail building completed in 1911 is also included in the listing. Its design is Late Victorian Romanesque in style.[1]