Union township
- County:
- Pike County
- County Seat:
- No
- Area (mi²):
- 23.529
- State:
- Ohio
Union township is located in Pike County, Ohio. Union township has a 2026 population of 1,275. Union township is currently growing at a rate of 0.63% annually and its population has increased by 1.35% since the most recent census, which recorded a population of 1,258 in 2020.
The median age in Union township is 32.9 years: 40.4 years for males, and 31.9 years for females. For every 100 females there are 77.9 males.