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Zip Code 50138 — Knoxville, IA

50138 is a ZIP Code associated with Knoxville, IA, located within Marion. The postal region supports an estimated population of 11,117 residents across Data Pending housing units, with a population density of 25.5 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (41.302460, -93.105340)

Data MetricLocal Statistic
Postal / Zip Code50138
Primary CityKnoxville
State / ProvinceIA
CountyMarion
Total Population11,117
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density25.5 people/sq mi
TimezoneAmerica/Chicago

How 50138 Compares

MetricZIP 50138Marion CountyIA State Average
Population11,11733,8543,210,984
Median IncomeData PendingN/AN/A
Population Density25.5 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 50119Harvey8.3 mi392N/A
Zip 50062Melcher Dallas8.6 mi789N/A
Zip 50057Columbia8.8 mi327N/A
Zip 50163Melcher Dallas9.0 mi689N/A
Zip 50225Pleasantville10.2 mi3,364N/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 →