
Sioux Valley township
- County:
- Union County
- County Seat:
- No
- Area (mi²):
- 42.08
- State:
- South Dakota
Sioux Valley township is located in Union County, South Dakota. Sioux Valley township has a 2025 population of 248. Sioux Valley township is currently growing at a rate of 2.06% annually and its population has increased by 9.73% since the most recent census, which recorded a population of 226 in 2020.
The average household income in Sioux Valley township is $170,272 with a poverty rate of 0%. The median age in Sioux Valley township is 50.7 years: 50.5 years for males, and 50.9 years for females.