Find the last 4 digits (ZIP+4) for an address in 52321

ZIP 52321, Onslow, IA is filled in. Just type the street address.

Addresses are checked through our secure proxy. Bot checks use Cloudflare Turnstile. Each device can run 5 live checks per day; repeats of the same address are free.

ZIP Code 52321 – Onslow, IA

Onslow, Iowa · Jones County · Central time

ZIP code52321
CityOnslow
StateIowa
CountyJones County
Population395
Time zoneCentral · local time
ZIP typeStandard (has a Census ZCTA area)
Land area37.55 sq mi
Center (lat, long)42.1417, -90.9831

Area codes in this area

563

These are the area codes that most often serve ZIP 52321 (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.

Map

Nearby ZIP codes

52309 Monmouth · 4.9 mi52362 Wyoming · 5.8 mi52212 Center Junction · 5.9 mi52207 Baldwin · 8.5 mi52033 Cascade · 9.6 mi52323 Oxford Junction · 11 mi52310 Monticello · 12.1 mi52032 Bernard · 12.6 mi

About ZIP 52321

ZIP code 52321 is assigned to Onslow, Iowa. It lies in Jones County. Its Census area covers about 37.55 square miles of land. The closest neighboring ZIP is 52309 (Monmouth), about 4.9 miles away.

Every address in 52321 also has a 4-digit add-on code (ZIP+4) that points to a smaller delivery area. Use the box above to find it.

Sources: US Census Bureau (ZCTA, county relationship files), GeoNames (CC BY 4.0), NANPA via NumberResearch.org (CC BY 4.0). Map © OpenStreetMap contributors. ZIP areas are approximate. Population: U.S. Census Bureau, ACS 5-year estimates, 2024 (ZCTA). Data sources