50131   Zip Code Johnston Polk IA United States

City Johnston
County Polk
State Iowa
Latitude 41.69749
Longitude -93.72021
Population 24,583
Density 1038.08 people per square mile
Time Zone America/Chicago
  • All demographic data comes from the 2024 American Community Survey (5-year study).
  • Learn more about each field.
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Household Income

Median household: $106,551
Median individual: $56,831

Race

Mode: 76.7% White

Gender

 51.5% female 

Rent

  $1338 / month  

Median house value: $369,165.0

Age

Median: 37.5 years old

Education

With at least college degree: 57.7%
With STEM degree: 43.3%

Marital Status

 60.6% married 

Never married: 25.6%

Labor Force Participation

 71.0% working 

Unemployed: 2.1%

Average Family Size

 3.13 people 

Commute Time

 19.8 minutes 

Health Care

 1.7% uninsured 

Poverty

 10.1%

All data comes from the SimpleMaps US Zips Comprehensive Database, February 2026.

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