Home > IA > Cerro Gordo County > Mason City > Zip 50401

Zip Code 50401 — Mason City, IA

50401 is a ZIP Code associated with Mason City, IA, located within Cerro Gordo. The postal region supports an estimated population of 28,703 residents across Data Pending housing units, with a population density of 74.8 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (43.153890, -93.200060)

Data MetricLocal Statistic
Postal / Zip Code50401
Primary CityMason City
State / ProvinceIA
CountyCerro Gordo
Total Population28,703
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density74.8 people/sq mi
TimezoneAmerica/Chicago

How 50401 Compares

MetricZIP 50401Cerro Gordo CountyIA State Average
Population28,70341,8683,210,984
Median IncomeData PendingN/AN/A
Population Density74.8 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 50467Rock Falls7.8 mi63N/A
Zip 50464Plymouth9.2 mi694N/A
Zip 50456Manly9.3 mi1,699N/A
Zip 50428Clear Lake9.6 mi9,071N/A
Zip 50458Nora Springs9.8 mi2,094N/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 →