51108   Zip Code Sioux City Plymouth IA United States

City Sioux City
County Plymouth
State Iowa
Latitude 42.56625
Longitude -96.34858
Population 5,960
Density 129.53 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: $81,205
Median individual: $45,840

Race

Mode: 79.2% White

Gender

 54.2% male 

Rent

  $1350 / month  

Median house value: $169,914.0

Age

Median: 37.6 years old

Education

With at least college degree: 28.7%
With STEM degree: 48.8%

Marital Status

 59.7% married 

Never married: 26.2%

Labor Force Participation

 63.2% working 

Unemployed: 5.6%

Average Family Size

 3.30 people 

Commute Time

 18.4 minutes 

Health Care

 1.8% uninsured 

Poverty

 6.5%

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

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