| Grant County Courthouse | |
| Location: | Virginia Avenue, Petersburg, West Virginia |
| Coordinates: | 38.9928°N -79.1211°W |
| Built: | 1878 |
| Architect: | George F. Sansbury |
| Architecture: | Colonial Revival, Classical Revival, Neo-Colonial |
| Added: | October 26, 1979 |
| Mpsub: | South Branch Valley MRA (AD) |
| Refnum: | 79003306 |
Grant County Courthouse, also known as the Old Grant County Courthouse, is a historic county courthouse located at Petersburg, serving Grant County, West Virginia. The original section was built in 1878–79 and expanded in 1909. It is composed of 3 two-story brick rectangles consisting of a large center section with lower and narrower wings. The building is styled with Neo-Colonial design features. The center section features a two-story projecting portico with pediment and supported by four Corinthian order fluted columns.[1]
It was listed on the National Register of Historic Places in 1979.