Sun Prairie township
- County:
- McCook County
- County Seat:
- No
- Area (mi²):
- 36.476
- State:
- South Dakota
Sun Prairie township is located in McCook County, South Dakota. Sun Prairie township has a 2026 population of 137. Sun Prairie township is currently growing at a rate of 0.74% annually and its population has increased by 4.58% since the most recent census, which recorded a population of 131 in 2020.
The median household income in Sun Prairie township is $86,989 with a poverty rate of 0%. The median age in Sun Prairie township is 41.6 years: 41.5 years for males, and 51.5 years for females. For every 100 females there are 157.1 males.