Illinois
#6 in USMidwestThe Prairie State Ā· Illinois (IL) has a population of 12,549,689 people, making it the #6 most populous state in the United States. The capital is Springfield and the largest city is Chicago.
Population
12.5M
#6 of 51
Area
57,914 miĀ²
149,997 kmĀ²
Density
84/kmĀ²
217/miĀ²
Capital
Springfield
Median Income
$80K
Above national avg
Unemployment
4.7%
National avg: 3.9%
Median Age
39.5
US Share
3.75%
of 335M total
Population Growth
2020 Census
12,812,508
2023 Estimate
12,549,689
Change
-262,819 (-2.1%)
Race & Ethnicity
Age Distribution
Economy & Education
- Median Household Income
- $80,306
- Poverty Rate
- 11.6%
- Unemployment Rate
- 4.7%
- Bachelor's Degree+
- 38.3%
Largest Cities in Illinois
Frequently Asked Questions
What is the population of Illinois?
Illinois has a population of 12,549,689 according to the 2023 American Community Survey. It ranks #6 among all US states by population, representing 3.75% of the total US population.
What is the capital of Illinois?
The capital of Illinois is Springfield. The largest cities include Chicago, Aurora, Joliet.
What is the median household income in Illinois?
The median household income in Illinois is $80,306, above the national average of $77,589.
How fast is Illinois growing?
Illinois has declined 2.1% since the 2020 Census, from 12,812,508 to 12,549,689.