Alton, Iowa
| Alton, Iowa | |
|---|---|
| St. Mary's Catholic Church | |
| Location of Alton, Iowa | |
| Coordinates: 42°59′36″N 96°0′21″W / 42.99333°N 96.00583°W | |
| Country | USA | 
| State | Iowa | 
| County | Sioux | 
| Incorporated | March 8, 1883 | 
| Area | |
|  • Total | 1.90 sq mi (4.93 km2) | 
| • Land | 1.90 sq mi (4.93 km2) | 
| • Water | 0.00 sq mi (0.00 km2) | 
| Elevation | 1,316 ft (401 m) | 
| Population  (2020) | |
|  • Total | 1,248 | 
| • Density | 656.15/sq mi (253.33/km2) | 
| Time zone | UTC-6 (Central (CST)) | 
| • Summer (DST) | UTC-5 (CDT) | 
| ZIP code | 51003 | 
| Area code | 712 | 
| FIPS code | 19-01585 | 
| GNIS feature ID | 2393936 | 
| Website | City of Alton | 
Alton is a city in Sioux County, Iowa, United States, along the Floyd River. The population was 1,248 at the 2020 census.