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Zip Code 50131 — Johnston, IA

50131 is a ZIP Code associated with Johnston, IA, located within Polk. The postal region supports an estimated population of 24,583 residents across Data Pending housing units, with a population density of 400.7 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (41.697490, -93.720210)

Data MetricLocal Statistic
Postal / Zip Code50131
Primary CityJohnston
State / ProvinceIA
CountyPolk
Total Population24,583
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density400.7 people/sq mi
TimezoneAmerica/Chicago

How 50131 Compares

MetricZIP 50131Polk CountyIA State Average
Population24,583499,2423,210,984
Median IncomeData PendingN/AN/A
Population Density400.7 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 50111Grimes4.3 mi16,865N/A
Zip 50322Urbandale4.5 mi31,931N/A
Zip 50023Ankeny4.9 mi46,306N/A
Zip 50310Des Moines5.4 mi31,177N/A
Zip 50313Des Moines5.8 mi17,440N/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 →