Decatur, IL Census Data
Key demographic and economic indicators for Decatur, Illinois from the 2023 American Community Survey (ACS) 5-year estimates.
Updated: 2026-03-23 · Source: U.S. Census Bureau, ACS 2023
Population
70,368
47.3% male · 52.7% female
Median Age
39.9
1.2 above the national average (38.7 yrs)
Median Household Income
$50,809
27,729.0 below the national average ($78,538)
Bachelor's Degree or Higher
21.3%
13.7 below the national average (35.0%)
HS diploma or higher: 91.8%
Poverty Rate
19.1%
6.7 above the national average (12.4%)
Uninsured: 4.8%
Broadband Access
90.8%
1.1 above the national average (89.7%)
Median Home Value
$97,300
Median rent: $796 · 62% owner-occupied
Unemployment Rate
8.9%
Labor force participation: 50.6%
Demographics
Race & Ethnicity
Age Distribution
Commute to Work
Decatur, IL Frequently Asked Questions
What is the population of Decatur, IL?
The population of Decatur, IL is 70,368 according to the 2023 American Community Survey 5-year estimates. The median age is 39.9 years.
What is the median household income in Decatur?
The median household income in Decatur, IL is $50,809, below the national average of $78,538. Per capita income is $38,517.
What is the poverty rate in Decatur?
The poverty rate in Decatur, IL is 19.1%, compared to the national average of 12.4%. About 4.8% of residents lack health insurance.
What percentage of Decatur residents have a college degree?
21.3% of adults (25+) in Decatur hold a bachelor's degree or higher, and 91.8% have at least a high school diploma. The national average for bachelor's degree holders is 35.0%.
What is the median home value in Decatur?
The median home value in Decatur, IL is $97,300. Median rent is $796 per month, with 62% of housing units owner-occupied.
What is the racial makeup of Decatur?
Decatur's population is 67.2% White, 24.1% Black, 3.2% Hispanic or Latino, and 1.4% Asian (source: 2023 ACS).