Watertown township
- County:
- Washington County
- County Seat:
- No
- Area (mi²):
- 36.265
- State:
- Ohio
Watertown township is located in Washington County, Ohio. Watertown township has a 2026 population of 1,475. Watertown township is currently declining at a rate of -0.27% annually and its population has decreased by -2.38% since the most recent census, which recorded a population of 1,511 in 2020.
The median household income in Watertown township is $102,986 with a poverty rate of 1.47%. The median age in Watertown township is 44.1 years: 42.3 years for males, and 44.4 years for females. For every 100 females there are 104.3 males.