Alton city, Iowa
Official LSAD Designation: Alton city • Census GEOID: 1901585
• Sioux County
Alton city is an incorporated city in Sioux County, Iowa. According to official records from the Census (2025), Alton city had an estimated population of 1,254 residents. Official Census Bureau geographic records classify this community under LSAD designation Alton city (GEOID 1901585).
Local Government Administration U.S. Census Bureau GMAF
City Of Alton
Municipal
Official Title:
City Admininstrator
Address:
PO BOX 910, ALTON IA 51003-0910
County Of Sioux
County
Official Title:
Auditor, Sioux County
Address:
PO BOX 18, ORANGE CITY IA 51041-0018
Civic & Statistical Snapshot
| Category | Estimate | Survey Period / Source |
|---|---|---|
| Total Population | 1,254 | 2025 |
| Median Household Income | $98,036 | 2020-2024 |
| Median Home Value | $218,900 | 2020-2024 |
| Land Area | 1.91 sq mi | Gazetteer (2026) |
| Civic & Public Services | Hospitals, Libraries, Colleges | CMS / IMLS / IPEDS |
| Schools & Districts | NCES Directory Listings | Provided by k12guides.com |
| Nearby Airports | Landing Facilities | Provided by airport-data.com |
| Climate & Weather | NOAA 30-Year Normals | 1991–2020 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).