City in Madison County and St. Clair County, Illinois
Collinsville
District lines run through Collinsville, so who represents you here depends on your street. Search your address to see yours.
Who lives in Collinsville
Census survey estimates for 2020 to 2024, rounded.
People
- Population
- 24,000
- Median age
- 38.5 years
- Under 18
- 20%
- 65 and over
- 18%
- Veterans, of adults
- 7%
- Speak another language at home
- 6%
Race and ethnicity
- Hispanic or Latino, of any race
- 7%
- White, not Hispanic
- 71%
- Black, not Hispanic
- 16%
- Asian, not Hispanic
- 1%
Income and housing
- Median household income
- $67,600
- Below the poverty line
- 12%
- Bachelor's or higher, adults 25+
- 31%
- Owner-occupied homes
- 66%
- Median home value
- $164,000
2024 vote for president
Not counted for Collinsville on its own: its precincts follow township lines, not the town’s. See the figures for Madison County and St. Clair County.
Represent all of Collinsville
Represent part of Collinsville
Each represents the part of Collinsville inside their district. Under each is how many people lived in that part at the 2020 Census, of 24,366 in all.
Mike BostU.S. Representative, District 12, Republican0 people in this part
Nikki BudzinskiU.S. Representative, District 13, Democratic20,066 people in this part
Mary E. MillerU.S. Representative, District 15, Republican4,300 people in this part- JPJason PlummerState Senator, District 55, Republican345 people in this part
- EHErica HarrissState Senator, District 56, Republican24,021 people in this part
- CMCharlie MeierState Representative, District 109, Republican345 people in this part
- AEAmy ElikState Representative, District 111, Republican489 people in this part
- KSKatie StuartState Representative, District 112, Democratic23,532 people in this part
Collinsville's districts (8)
U.S. House (3)
- U.S. House District 12
Held by Mike Bost, Republican
Part of Collinsville: 0 people in 2020
- U.S. House District 13
Held by Nikki Budzinski, Democratic
Part of Collinsville: 20,066 people in 2020
- U.S. House District 15
Held by Mary E. Miller, Republican
Part of Collinsville: 4,300 people in 2020
Illinois Senate (2)
- Illinois Senate District 55
Held by Jason Plummer, Republican
Part of Collinsville: 345 people in 2020
- Illinois Senate District 56
Held by Erica Harriss, Republican
Part of Collinsville: 24,021 people in 2020
Illinois House (3)
- Illinois House District 109
Held by Charlie Meier, Republican
Part of Collinsville: 345 people in 2020
- Illinois House District 111
Held by Amy Elik, Republican
Part of Collinsville: 489 people in 2020
- Illinois House District 112
Held by Katie Stuart, Democratic
Part of Collinsville: 23,532 people in 2020
Source: U.S. Census Bureau, American Community Survey 5-year estimates, 2020–2024; towns and counties from the 2020 Census, 119th Congressional District and 2024 state legislative district tabulation. Figures rounded by us. Retrieved 2026-10-19. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.