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 2026 population of 932. Washington township is currently growing at a rate of 3.21% annually and its population has increased by 15.63% since the most recent census, which recorded a population of 806 in 2020.
The median household income in Washington township is $106,016 with a poverty rate of 0%. The median age in Washington township is 38.6 years: 38.9 years for males, and 33.9 years for females. For every 100 females there are 148.3 males.