
Gann Valley
- County:
- Buffalo County
- County Seat:
- No
- Area (mi²):
- 0.079
- State:
- South Dakota
Gann Valley is a CDP located in Buffalo County, South Dakota. Gann Valley has a 2025 population of 15. Gann Valley is currently growing at a rate of 7.14% annually and its population has increased by 36.36% since the most recent census, which recorded a population of 11 in 2020.
The average household income in Gann Valley is -$1000.00 Mn with a poverty rate of 0%. The median age in Gann Valley is 0 years: 0 years for males, and 0 years for females.