Collinsville Flag

Collinsville

County:
Madison County
County Seat:
No
Area (mi²):
15.438
State:
Illinois

Collinsville is a city located in Madison County, Illinois. Collinsville has a 2026 population of 23,465. Collinsville is currently declining at a rate of -0.64% annually and its population has decreased by -3.71% since the most recent census, which recorded a population of 24,368 in 2020.

The median household income in Collinsville is $67,612 with a poverty rate of 11.99%. The median age in Collinsville is 38.5 years: 37.1 years for males, and 41.4 years for females. For every 100 females there are 95.4 males.

23.5K
Total Population
1,520
Density (mi²)
-150 -0.64%
Growth

Collinsville Population

Demographics

Economics and Income Statistics

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)