🇺🇸 United States ZIP Code

STANDARD

50401

Mason City

ZIP Code 50401 is a standard zip code serving Mason City, Mason City, Iowa (IA), in Cerro Gordo County, United States. It has an estimated population of 29,837 with a median household income of $42,458. The area falls within the America/Chicago timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: Iowa (IA)
County: Cerro Gordo
City: Mason City
Timezone: America/Chicago

Coordinates

Latitude: 43.149900
Longitude: -93.195400

Geographic Details

Land Area: 149.16 mi²
Water Area: 0.46 mi²
Population Density: 200.0 people per mi² (60th percentile)
Bounding Box: 43.255338°N, 43.037496°S, -93.062817°E, -93.320095°W

With 29,837 residents spread across 149.16 square miles, this area has a population density of 200.0 people per square mile.

Demographics

29,837

Population

85th percentile

$42,458

Median Income

35th percentile

$99,800

Median Home Value

35th percentile

149.16 mi²

Land Area

The median household income in 50401 is $42,458, and the median home value is $99,800.

Housing

14,147

Total Units

13,103

Occupied Units

92.6%

Occupancy Rate

Nearby ZIP Codes

Other zip codes in Mason City, IA.

50402

Mason City

Similar ZIP Codes in Iowa

ZIP codes with similar median household income in Iowa.

51016

Correctionville

$42,604

52627

Fort Madison

$43,673

52806

Davenport

$48,553

52141

Elgin

$39,679

52142

Fayette

$42,098

50641

Hazleton

$46,167

52556

Fairfield

$47,440

50014

Ames

$37,661

Frequently Asked Questions

What information is available for each ZIP code?

Each ZIP code page shows city, state, county, geographic coordinates, timezone, population, median household income, median home value, housing units, land area, population density, commute time, educational attainment, area codes, and ZIP code type (Standard, PO Box, or Unique).

What are the different types of ZIP codes?

There are three types of ZIP codes: Standard (residential and commercial delivery areas), PO Box (assigned to post office box sections), and Unique (assigned to a single high-volume address like a government agency or large company). Standard ZIP codes are the most common.

How often is ZIP code data updated?

ZIP code assignments are updated quarterly by the USPS. Demographic data comes from the US Census Bureau's American Community Survey (ACS), which releases new 5-year estimates annually. ZipFYI updates its data to reflect the latest available information.

What is population density and why does it matter?

Population density measures the number of people per square mile in a ZIP code area. It helps identify urban vs. rural areas, affects real estate values, impacts service availability, and is used in market analysis. Dense urban ZIP codes may have 50,000+ people per square mile.

How are ZIP code boundaries determined?

ZIP code boundaries are determined by the USPS based on mail delivery routes, not political or geographic boundaries. They follow carrier routes and may cross city, county, or even state lines. Boundaries can change when the USPS reorganizes delivery operations.

What does median household income tell me about a ZIP code?

Median household income is the middle value when all household incomes in a ZIP code are sorted. Half of households earn more and half earn less. It is a better indicator of typical earnings than average income, which can be skewed by very high or very low outliers.