Washington township
- County:
- Harrison County
- County Seat:
- No
- Area (mi²):
- 30.327
- State:
- Ohio
Washington township is located in Harrison County, Ohio. Washington township has a 2026 population of 594. Washington township is currently declining at a rate of -0.83% annually and its population has decreased by -3.1% since the most recent census, which recorded a population of 613 in 2020.
The median household income in Washington township is $71,500 with a poverty rate of 3.56%. The median age in Washington township is 25.2 years: 32.5 years for males, and 20.2 years for females. For every 100 females there are 60.7 males.