Adams   County IL United States

County FIPS 17001
Largest City Quincy
State Illinois
Latitude 39.9879
Longitude -91.1885
Population 64,754
Density 75.75 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: $66,220
Median individual: $38,405

Race

Mode: 90.6% White

Gender

 50.7% female 

Rent

  $828 / month  

Median house value: $162,855.0

Age

Median: 41.4 years old

Education

With at least college degree: 27.4%
With STEM degree: 42.5%

Marital Status

 50.1% married 

Never married: 29.3%

Labor Force Participation

 65.2% working 

Unemployed: 3.9%

Average Family Size

 2.95 people 

Commute Time

 16.9 minutes 

Health Care

 4.4% uninsured 

Poverty

 12.8%

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.