Oberlin
- County:
- Decatur County
- County Seat:
- Yes
- Area (mi²):
- 1.91
- State:
- Kansas
Oberlin is a city located in Decatur County, Kansas. Oberlin has a 2026 population of 1,610. It is also the county seat of Decatur County. Oberlin is currently declining at a rate of -0.49% annually and its population has decreased by -1.11% since the most recent census, which recorded a population of 1,628 in 2020.