
Washington township
- County:
- Union County
- County Seat:
- No
- Area (mi²):
- 27.738
- State:
- Ohio
Washington township is located in Union County, Ohio. Washington township has a 2025 population of 971. Washington township is currently growing at a rate of 3.74% annually and its population has increased by 20.47% since the most recent census, which recorded a population of 806 in 2020.
The average household income in Washington township is $95,476 with a poverty rate of 3.79%. The median age in Washington township is 38.5 years: 36.4 years for males, and 40.8 years for females.