Union township
- County:
- Moody County
- County Seat:
- No
- Area (mi²):
- 22.424
- State:
- South Dakota
Union township is located in Moody County, South Dakota. Union township has a 2026 population of 84. Union township is currently growing at a rate of 3.7% annually and its population has increased by 5% since the most recent census, which recorded a population of 80 in 2020.
The median age in Union township is 25.2 years: 25.5 years for males, and 0 years for females. For every 100 females there are 105.3 males.