Oslo township
- County:
- Brookings County
- County Seat:
- No
- Area (mi²):
- 35.614
- State:
- South Dakota
Oslo township is located in Brookings County, South Dakota. Oslo township has a 2026 population of 227. Oslo township is currently growing at a rate of 1.79% annually and its population has increased by 7.58% since the most recent census, which recorded a population of 211 in 2020.
The median household income in Oslo township is $80,595 with a poverty rate of 0%. The median age in Oslo township is 28.6 years: 28.3 years for males, and 30.7 years for females. For every 100 females there are 228.0 males.