Zip Code 52321 — Onslow, IA
52321 is a ZIP Code associated with Onslow, IA, located within Jones. 52321 ranks #9 out of 11 ZIP codes in Jones County by population (and #734 out of 970 in IA). The area supports an estimated population of 395 residents across Data Pending housing units, with a population density of 4.1 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (42.141680, -90.983070)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 52321 |
| Primary City | Onslow |
| State / Province | IA |
| County | Jones |
| Total Population | 395 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 4.1 people/sq mi |
| Timezone | America/Chicago |
How 52321 Compares
| Metric | ZIP 52321 | Jones County | IA State Average |
|---|
| Population | 395 | 23,520 (Total) | 3,210,984 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 4.1 /sq mi | -- | -- |
| County Pop Rank | #9 of 11 | -- | -- |
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 →