Alton
- County:
- Osborne County
- County Seat:
- No
- Area (mi²):
- 0.309
- State:
- Kansas
Alton is a city located in Osborne County, Kansas. Alton has a 2026 population of 93. Alton is currently declining at a rate of -2.11% annually and its population has decreased by -5.1% since the most recent census, which recorded a population of 98 in 2020.