
Oacoma township
- County:
- Lyman County
- County Seat:
- No
- Area (mi²):
- 59.857
- State:
- South Dakota
Oacoma township is located in Lyman County, South Dakota. Oacoma township has a 2025 population of 80. Oacoma township is currently declining at a rate of 0% annually and its population has decreased by -1.23% since the most recent census, which recorded a population of 81 in 2020.
The average household income in Oacoma township is $146,218 with a poverty rate of 12.28%. The median age in Oacoma township is 74.2 years: 77.8 years for males, and 68 years for females.