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 2026 population of 81. Oacoma township is currently declining at a rate of 0% annually and its population has decreased by -1.22% since the most recent census, which recorded a population of 82 in 2020.
The median household income in Oacoma township is $163,929 with a poverty rate of 23.53%. The median age in Oacoma township is 62.5 years: 64.1 years for males, and 62.4 years for females. For every 100 females there are 121.7 males.