Washington township
- County:
- Belmont County
- County Seat:
- No
- Area (mi²):
- 35.392
- State:
- Ohio
Washington township is located in Belmont County, Ohio. Washington township has a 2026 population of 498. Washington township is currently declining at a rate of -0.8% annually and its population has decreased by -2.73% since the most recent census, which recorded a population of 512 in 2020.
The median age in Washington township is 39.1 years: 28.7 years for males, and 39.4 years for females. For every 100 females there are 72.2 males.