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Zip Code 51446 — Irwin, IA

51446 is a ZIP Code associated with Irwin, IA, located within Shelby. 51446 ranks #7 out of 10 ZIP codes in Shelby County by population (and #676 out of 970 in IA). The area supports an estimated population of 499 residents across Data Pending housing units, with a population density of 5.4 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (41.776630, -95.192770)

Data MetricLocal Statistic
Postal / Zip Code51446
Primary CityIrwin
State / ProvinceIA
CountyShelby
Total Population499
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density5.4 people/sq mi
TimezoneAmerica/Chicago

How 51446 Compares

MetricZIP 51446Shelby CountyIA State Average
Population49911,310 (Total)3,210,984 (Total)
Average ZIP IncomeData PendingN/AN/A
Population Density5.4 /sq mi----
County Pop Rank#7 of 10----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 51447Kirkman3.8 mi113N/A
Zip 51454Manilla7.2 mi1,254N/A
Zip 51527Defiance8.8 mi362N/A
Zip 51432Aspinwall9.6 mi45N/A
Zip 51543Kimballton10.3 mi478N/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 →