Washington Court House
- Country: United States
- State: Ohio
- Population: 14,144 (2016)
- Latitude: 39° 32.2' N (39.53645°)
- Longitude: 83° 26.3' W (-83.43908°)
- Elevation: 297 m/974 ft. above sea level
- Time zone: America/New_York (UTC -05:00); DST observed (UTC -04:00)
- Alternate names: Washington, Washington Courthouse