Dempster township
- County:
- Hamlin County
- County Seat:
- No
- Area (mi²):
- 35.948
- State:
- South Dakota
Dempster township is located in Hamlin County, South Dakota. Dempster township has a 2026 population of 243. Dempster township is currently growing at a rate of 1.67% annually and its population has increased by 8.97% since the most recent census, which recorded a population of 223 in 2020.
The median household income in Dempster township is $124,375 with a poverty rate of 4.21%. The median age in Dempster township is 44.5 years: 41.8 years for males, and 46.5 years for females. For every 100 females there are 137.5 males.