Onslow, IA ZIP code
The ZIP code for Onslow, Iowa is 52321. It is in Jones County.
- Population in these ZIPs
- 395
- Avg. median income
- $77,700population-weighted
- Typical home value
- $220,700population-weighted
- Metro area
- Cedar Rapids, IA
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Onslow, IA ZIP code list
| ZIP code | Population | Median income | Typical home value |
|---|---|---|---|
| 52321 | 395 | $77,708 | $220,700 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities near Onslow
- Monmouth 5 mi
- Wyoming 6 mi
- Center Junction 6 mi
- Baldwin 9 mi
- Cascade 10 mi
- Oxford Junction 11 mi
- Monticello 12 mi
- Bernard 13 mi
- Olin 13 mi
- Langworthy 13 mi
- Maquoketa 16 mi
- Anamosa 16 mi
Frequently asked questions
What is the ZIP code for Onslow, IA?
The ZIP code for Onslow, IA is 52321.
What county is Onslow, Iowa in?
Onslow ZIP codes are in Jones County.