| Lamar County Courthouse | |
| Location: | Thomaston St., Barnesville, Georgia |
| Coordinates: | 33.0522°N -84.1561°W |
| Architect: | Eugene C. Wachendorff |
| Architecture: | Classical Revival |
| Added: | September 18, 1980 |
| Area: | less than one acre |
| Refnum: | 80001103 |
Lamar County Courthouse is located on Thomaston Street in Barnesville, Georgia. The county courthouse was designed by Eugene C. Wachendorff and built in 1931.[1] It was added to the National Register of Historic Places on September 18, 1980.