Zip Code 51023 — Hawarden, IA
51023 is a ZIP Code associated with Hawarden, IA, located within Sioux. 51023 ranks #5 out of 13 ZIP codes in Sioux County by population (and #180 out of 970 in IA). The area supports an estimated population of 3,473 residents across Data Pending housing units, with a population density of 11.2 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (43.008930, -96.468450)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 51023 |
| Primary City | Hawarden |
| State / Province | IA |
| County | Sioux |
| Total Population | 3,473 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 11.2 people/sq mi |
| Timezone | America/Chicago |
How 51023 Compares
| Metric | ZIP 51023 | Sioux County | IA State Average |
|---|
| Population | 3,473 | 41,702 (Total) | 3,210,984 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 11.2 /sq mi | -- | -- |
| County Pop Rank | #5 of 13 | -- | -- |
Nearby ZIP Codes
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 →