📍 View location on OpenStreetMap (42.983550, -95.986420)
| Data Metric | Local Statistic |
|---|---|
| Postal / Zip Code | 51003 |
| Primary City | Alton |
| State / Province | IA |
| County | Sioux |
| Total Population | 1,938 |
| Population Density | 13.8 people/sq mi |
| Timezone | America/Chicago |
| Metric | ZIP 51003 | Sioux County records | IA records |
|---|---|---|---|
| Population estimate | 1,938 | 41,702 (sum) | 3,210,984 (sum) |
| Population Density | 13.8 /sq mi | -- | -- |
| County population rank | #7 of 13 | -- | -- |
| State population rank | #288 of 969 | -- | -- |
Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.
| ZIP Code | City | Distance | Population estimate |
|---|---|---|---|
| ZIP 51041 | Orange City | 5.4 mi | 7,324 |
| ZIP 51022 | Granville | 7.0 mi | 960 |
| ZIP 51238 | Hospers | 8.0 mi | 1,502 |
| ZIP 51036 | Maurice | 10.3 mi | 445 |
| ZIP 51045 | Oyens | 11.9 mi | 66 |
Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →