Find the last 4 digits (ZIP+4) for an address in 51545

ZIP 51545, Little Sioux, IA is filled in. Just type the street address.

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ZIP Code 51545 – Little Sioux, IA

Little Sioux, Iowa · Harrison County · Central time

ZIP code51545
CityLittle Sioux
StateIowa
CountyHarrison CountyMonona County
Population267
Time zoneCentral · local time
ZIP typeStandard (has a Census ZCTA area)
Land area46.47 sq mi
Center (lat, long)41.8510, -96.0146

Area codes in this area

712

These are the area codes that most often serve ZIP 51545 (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

51523 Blencoe · 5.2 mi51564 Pisgah · 5.5 mi51557 Mondamin · 8.1 mi51558 Moorhead · 8.2 mi68061 Tekamah · 11 mi51040 Onawa · 12.8 mi51550 Magnolia · 13.1 mi51572 Soldier · 14.1 mi

About ZIP 51545

ZIP code 51545 is assigned to Little Sioux, Iowa. It crosses 2 counties; most of its land is in Harrison County. Its Census area covers about 46.47 square miles of land. The closest neighboring ZIP is 51523 (Blencoe), about 5.2 miles away.

Every address in 51545 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