Home > IA > Woodbury County > Sioux City > Zip 51101

Zip Code 51101 — Sioux City, IA

51101 is a ZIP Code associated with Sioux City, IA, located within Woodbury. The postal region supports an estimated population of 1,031 residents across Data Pending housing units, with a population density of 330.8 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (42.494130, -96.393610)

Data MetricLocal Statistic
Postal / Zip Code51101
Primary CitySioux City
State / ProvinceIA
CountyWoodbury
Total Population1,031
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density330.8 people/sq mi
TimezoneAmerica/Chicago

How 51101 Compares

MetricZIP 51101Woodbury CountyIA State Average
Population1,03197,4393,210,984
Median IncomeData PendingN/AN/A
Population Density330.8 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 51105Sioux City1.7 mi10,415N/A
Zip 51104Sioux City2.9 mi23,197N/A
Zip 51103Sioux City3.3 mi16,895N/A
Zip 51106Sioux City4.3 mi28,592N/A
Zip 51108Sioux City5.5 mi5,960N/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 →