
Union township
- County:
- Spink County
- County Seat:
- No
- Area (mi²):
- 36.012
- State:
- South Dakota
Union township is located in Spink County, South Dakota. Union township has a 2025 population of 49. Union township is currently growing at a rate of 2.08% annually and its population has increased by 4.26% since the most recent census, which recorded a population of 47 in 2020.
The average household income in Union township is $166,419 with a poverty rate of 2.35%. The median age in Union township is 60.4 years: 60.2 years for males, and 63.5 years for females.