
Fairfax township
- County:
- Gregory County
- County Seat:
- No
- Area (mi²):
- 32.426
- State:
- South Dakota
Fairfax township is located in Gregory County, South Dakota. Fairfax township has a 2025 population of 64. Fairfax township is currently growing at a rate of 1.59% annually and its population has increased by 4.92% since the most recent census, which recorded a population of 61 in 2020.
The average household income in Fairfax township is $110,256 with a poverty rate of 1.74%. The median age in Fairfax township is 60.8 years: 59.6 years for males, and 63 years for females.