Founded in 1867, Osborne County is one of 105 counties in the state of Kansas. Historically, Osborne County was formed from unorganized area. The city of Osborne is the county seat. With FIPS code of 141, Osborne County has a population of 3,498 and area of 893 square miles (2,313 km2).
List of all cities in Osborne County, KS alphabetically
| City/Town | Postal Code | Area Code |
| Alton, KS | 67623 | 785 |
| Downs, KS | 67437 | 785 |
| Natoma, KS | 67651 | 785 |
| Osborne, KS | 67473 | 785 |
| Portis, KS | 67474 | 785 |