Allen township
- County:
- Bennett County
- County Seat:
- No
- Area (mi²):
- 36.73
- State:
- South Dakota
Allen township is located in Bennett County, South Dakota. Allen township has a 2026 population of 76. Allen township is currently declining at a rate of 0% annually and its population has decreased by 0% since the most recent census, which recorded a population of 76 in 2020.
The median household income in Allen township is $92,656 with a poverty rate of 4.63%. The median age in Allen township is 29.5 years: 33.1 years for males, and 8.8 years for females. For every 100 females there are 77.0 males.