
Old Washington
- County:
- Guernsey County
- County Seat:
- No
- Area (mi²):
- 0.672
- State:
- Ohio
Old Washington is a village located in Guernsey County, Ohio. Old Washington has a 2025 population of 221. Old Washington is currently declining at a rate of -0.45% annually and its population has decreased by -2.21% since the most recent census, which recorded a population of 226 in 2020.
The average household income in Old Washington is $98,154 with a poverty rate of 11.61%. The median age in Old Washington is 40.1 years: 39.4 years for males, and 42 years for females.