Alpena township
- County:
- Jerauld County
- County Seat:
- No
- Area (mi²):
- 33.097
- State:
- South Dakota
Alpena township is located in Jerauld County, South Dakota. Alpena township has a 2026 population of 92. Alpena township is currently growing at a rate of 2.22% annually and its population has increased by 5.75% since the most recent census, which recorded a population of 87 in 2020.
The median household income in Alpena township is $106,875 with a poverty rate of 34.48%. The median age in Alpena township is 13.5 years: 12.4 years for males, and 16.7 years for females. For every 100 females there are 123.1 males.