Gayville township
- County:
- Yankton County
- County Seat:
- No
- Area (mi²):
- 31.078
- State:
- South Dakota
Gayville township is located in Yankton County, South Dakota. Gayville township has a 2026 population of 180. Gayville township is currently declining at a rate of -1.64% annually and its population has decreased by -1.1% since the most recent census, which recorded a population of 182 in 2020.
The median household income in Gayville township is $64,143 with a poverty rate of 5.8%. The median age in Gayville township is 42.9 years: 42.7 years for males, and 59.9 years for females. For every 100 females there are 255.6 males.