
Union township
- County:
- Butte County
- County Seat:
- No
- Area (mi²):
- 141.203
- State:
- South Dakota
Union township is located in Butte County, South Dakota. Union township has a 2025 population of 22. Union township is currently declining at a rate of 0% annually and its population has increased by 10% since the most recent census, which recorded a population of 20 in 2020.
The average household income in Union township is $0 with a poverty rate of 0%. The median age in Union township is 0 years: 0 years for males, and 0 years for females.