Chelsea
- County:
- Faulk County
- County Seat:
- No
- Area (mi²):
- 0.317
- State:
- South Dakota
Chelsea is a town located in Faulk County, South Dakota. Chelsea has a 2026 population of 19. Chelsea is currently declining at a rate of 0% annually and its population has decreased by 0% since the most recent census, which recorded a population of 19 in 2020.
The median age in Chelsea is 52.1 years: 23.9 years for males, and 63.4 years for females. For every 100 females there are 369.2 males.