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

Zip Code 50401 — Mason City, IA

ZIP Code 50401 is associated with Mason City, IA, in Cerro Gordo County. The listed population estimate is 28,703; estimated density is 74.8 people per square mile. Among records with population estimates, it ranks #1 of 9 in Cerro Gordo County and #26 of 969 in IA.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (43.153890, -93.200060)

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

How 50401 Compares

MetricZIP 50401Cerro Gordo County recordsIA records
Population estimate28,70341,868 (sum)3,210,984 (sum)
Population Density74.8 /sq mi----
County population rank#1 of 9----
State population rank#26 of 969----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in IA

ZIP CodeCityDistancePopulation estimate
ZIP 50467Rock Falls7.8 mi63
ZIP 50464Plymouth9.2 mi694
ZIP 50456Manly9.3 mi1,699
ZIP 50428Clear Lake9.6 mi9,071
ZIP 50458Nora Springs9.8 mi2,094

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 →