Frankfort
- County:
- Spink County
- County Seat:
- No
- Area (mi²):
- 35.105
- State:
- South Dakota
Frankfort is located in Spink County, South Dakota. Frankfort has a 2025 population of 43 . Frankfort is currently declining at a rate of -2.27% annually and its population has decreased by -4.44% since the most recent census, which recorded a population of 45 in 2020.
The median age in Frankfort is 59.5 years: 0 years for males, and 0 years for females. For every 100 females there are 233.3 males.