| Washington County Courthouse | |
| Nrhp Type: | cp |
| Nocat: | yes |
| Partof: | Marietta Historic District (Marietta, Ohio) |
| Partof Refnum: | 74001646 |
| Location: | North corner of 2nd and Putnam Streets in Marietta, Ohio |
| Coordinates: | 39.4178°N -81.4553°W |
| Mapframe: | yes |
| Mapframe-Marker: | building |
| Mapframe-Zoom: | 12 |
| Mapframe-Caption: | Interactive map showing the location of Washington County Courthouse |
| Built: | 1902 |
| Architect: | Samuel Hannaford & Sons |
| Designated Nrhp Type: | December 19, 1974 |
The Washington County Courthouse is located at 205 Putnam Street in Marietta, Ohio. The courthouse is constructed of rusticated stone blocks for the foundation with smooth blocks rising to the roofline. The courthouse is the third for the county. The courthouse was designed and constructed by Samuel Hannaford & Sons, the same architects on the Monroe County Courthouse. The courthouse is included in the Marietta Historic District, which was added to the National Register on December 19, 1974.