La Prairie township
- County:
- Spink County
- County Seat:
- No
- Area (mi²):
- 49.849
- State:
- South Dakota
La Prairie township is located in Spink County, South Dakota. La Prairie township has a 2025 population of 55. La Prairie township is currently declining at a rate of -3.51% annually and its population has decreased by -11.29% since the most recent census, which recorded a population of 62 in 2020.
The average household income in La Prairie township is $112,181 with a poverty rate of 0%. The median age in La Prairie township is 41.7 years: 35.5 years for males, and 55.1 years for females.