Home > IA > Woodbury County > Sioux City > Zip 51111

Zip Code 51111 — Sioux City, IA

51111 is a ZIP Code associated with Sioux City, IA, located within Woodbury. The postal region supports an estimated population of 39 residents across Data Pending housing units, with a population density of 2.5 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (42.411290, -96.386060)

Data MetricLocal Statistic
Postal / Zip Code51111
Primary CitySioux City
State / ProvinceIA
CountyWoodbury
Total Population39
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density2.5 people/sq mi
TimezoneAmerica/Chicago

How 51111 Compares

MetricZIP 51111Woodbury CountyIA State Average
Population3997,4393,210,984
Median IncomeData PendingN/AN/A
Population Density2.5 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 51054Sergeant Bluff3.6 mi5,583N/A
Zip 51106Sioux City4.9 mi28,592N/A
Zip 51101Sioux City5.7 mi1,031N/A
Zip 51105Sioux City6.8 mi10,415N/A
Zip 51103Sioux City8.2 mi16,895N/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 →