Home > IA > Harrison County > Little Sioux > Zip 51545

Zip Code 51545 — Little Sioux, IA

51545 is a ZIP Code associated with Little Sioux, IA, located within Harrison. The postal region supports an estimated population of 267 residents across Data Pending housing units, with a population density of 2.2 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (41.838970, -96.020720)

Data MetricLocal Statistic
Postal / Zip Code51545
Primary CityLittle Sioux
State / ProvinceIA
CountyHarrison
Total Population267
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density2.2 people/sq mi
TimezoneAmerica/Chicago

How 51545 Compares

MetricZIP 51545Harrison CountyIA State Average
Population26714,7593,210,984
Median IncomeData PendingN/AN/A
Population Density2.2 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 51523Blencoe5.7 mi379N/A
Zip 51564Pisgah6.1 mi520N/A
Zip 51557Mondamin7.7 mi828N/A
Zip 51558Moorhead9.4 mi549N/A
Zip 51550Magnolia12.7 mi169N/A

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 →