Mercer   County IL United States

County FIPS 17131
Largest City Aledo
State Illinois
Latitude 41.2053
Longitude -90.7414
Population 15,495
Density 27.62 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: $74,182
Median individual: $42,319

Race

Mode: 94.2% White

Gender

 50.5% male 

Rent

  $786 / month  

Median house value: $144,030.0

Age

Median: 44.7 years old

Education

With at least college degree: 20.9%
With STEM degree: 45.2%

Marital Status

 61.9% married 

Never married: 22.6%

Labor Force Participation

 60.8% working 

Unemployed: 3.2%

Average Family Size

 2.80 people 

Commute Time

 28.1 minutes 

Health Care

 4.6% uninsured 

Poverty

 8.9%

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.