Farmington township
- County:
- Day County
- County Seat:
- No
- Area (mi²):
- 35.494
- State:
- South Dakota
Farmington township is located in Day County, South Dakota. Farmington township has a 2026 population of 27. Farmington township is currently declining at a rate of -3.57% annually and its population has decreased by 0% since the most recent census, which recorded a population of 27 in 2020.
The median age in Farmington township is 65.6 years: 74.1 years for males, and 55.6 years for females. For every 100 females there are 133.3 males.