Oslo
- County:
- Marshall County
- County Seat:
- No
- Area (mi²):
- 0.371
- State:
- Minnesota
Oslo is a city located in Marshall County, Minnesota. Oslo has a 2026 population of 239. Oslo is currently growing at a rate of 1.7% annually but its population has decreased by -0.83% since the most recent census, which recorded a population of 241 in 2020.