Alton
- County:
- Hidalgo County
- County Seat:
- No
- Area (mi²):
- 7.597
- State:
- Texas
Alton is a city located in Hidalgo County, Texas. Alton has a 2026 population of 22,907. Alton is currently growing at a rate of 8.01% annually and its population has increased by 24.73% since the most recent census, which recorded a population of 18,366 in 2020.