Jefferson   County IA United States

County FIPS 19101
Largest City Fairfield
State Iowa
Latitude 41.0318
Longitude -91.9489
Population 15,705
Density 36.06 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.
Download the data

Household Income

Median household: $61,620
Median individual: $35,651

Race

Mode: 84.4% White

Gender

 51.5% male 

Rent

  $883 / month  

Median house value: $161,228.0

Age

Median: 43.7 years old

Education

With at least college degree: 43.3%
With STEM degree: 47.3%

Marital Status

 47.7% married 

Never married: 33.0%

Labor Force Participation

 59.0% working 

Unemployed: 8.0%

Average Family Size

 2.76 people 

Commute Time

 15.9 minutes 

Health Care

 6.7% uninsured 

Poverty

 15.2%

All data comes from the SimpleMaps US Counties Database, 2026.

Home (Maps) | Database License | Privacy | Database Releases | Database Order Lookup | Resources | Contact | FAQs
SimpleMaps.com is a product of Pareto Software, LLC. © 2010-2026.