La Prairie
- County:
- Spink County
- County Seat:
- No
- Area (mi²):
- 49.849
- State:
- South Dakota
La Prairie is located in Spink County, South Dakota. La Prairie has a 2025 population of 56 . La Prairie is currently growing at a rate of 3.7% annually but its population has decreased by -1.75% since the most recent census, which recorded a population of 57 in 2020.
The median household income in La Prairie is $126,250 with a poverty rate of 0%. The median age in La Prairie is 41.7 years: 35.5 years for males, and 55.1 years for females. For every 100 females there are 115.4 males.