Overview
- District ID
- il-hd-112
- State
- Illinois
- Chamber
- Lower chamber
- District Code
- 112
- Land Area
- 103.4 sq mi
- Water Area
- 6.62 sq mi
Boundary
Boundary as GeoJSON
Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.
Counties
Showing all 2 counties
Places
Showing all 14 places
Overlapping Congressional Districts
| Congressional district | Population in both | Share of this district's population | Share of the congressional district's population | Share of this district's land |
|---|
| IL District 13 | 93,027 | 85.7% | 12.3% | 80.4% |
| IL District 12 | 8,288 | 7.6% | 1.1% | 13.5% |
| IL District 15 | 7,287 | 6.7% | 1.0% | 6.1% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 78,149
- Active Voters
- 75,550 (96.7%)
Party Registration
This state's voter file does not record party registration.
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 12,050 (15.4%) | 0 (0.0%) | 0 (0.0%) |
| 2023–2024 | 52,359 (67.0%) | 4,829 (6.2%) | 5,833 (7.5%) |
| 2021–2022 | 37,429 (47.9%) | 5,282 (6.8%) | 6,608 (8.5%) |
| 2019–2020 | 46,852 (60.0%) | 10,818 (13.8%) | 3,610 (4.6%) |
| 2017–2018 | 35,989 (46.1%) | 7,630 (9.8%) | 5,270 (6.7%) |
| 2015–2016 | 38,440 (49.2%) | 11,871 (15.2%) | 9,449 (12.1%) |
| 2013–2014 | 23,651 (30.3%) | 3,632 (4.6%) | 3,396 (4.3%) |
| 2011–2012 | 30,916 (39.6%) | 2,829 (3.6%) | 4,070 (5.2%) |
Turnout counts today's registered voters with a counted ballot in the cycle's elections (the odd and even year), as a share of today's registered voters. Voters who have since left the rolls are not counted.
Browse the voter list for this district (premium access; sign-in required)
Source: Civitech voter file snapshot as of 12/15/2025. These are registered voters, separate from the Census population figures. Counts under 10 are suppressed and shown as "<10".
Demographics
- Total Population
- 106,708 (± 1,786)
- Median Age
- 38.1
- Median Household Income
- $77,862 (± $3,043)
- High School Graduate or Higher (age 25+)
- 94.0%
- Bachelor's Degree or Higher (age 25+)
- 37.3%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 21,140 | 19.8% |
| 18 to 64 | 68,475 | 64.2% |
| 65 and over | 17,093 | 16.0% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 7,270 | 6.8% |
| White, not Hispanic | 75,785 | 71.0% |
| Black, not Hispanic | 16,168 | 15.2% |
| Asian, not Hispanic | 1,666 | 1.6% |
| American Indian / Alaska Native, not Hispanic | 104 | 0.1% |
| Native Hawaiian / Pacific Islander, not Hispanic | 34 | 0.0% |
| Some other race, not Hispanic | 184 | 0.2% |
| Two or more races, not Hispanic | 5,497 | 5.2% |
Source: U.S. Census Bureau, American Community Survey 2020-2024 ACS 5-year estimates (tables B01001, B01002, B01003, B03002, B15003, B19013) for this state legislative district. Estimates are survey-based; ± figures are 90% margins of error.
Citizen Voting Age Population
- Total Citizen Population
- 104,759
- Citizen Voting Age Population (CVAP)
- 83,805
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 98,587 | 94.1% |
| Hispanic | 6,173 | 5.9% |
| White | 76,744 | 73.3% |
| Black | 16,151 | 15.4% |
| Asian | 1,158 | 1.1% |
| American Indian / Alaska Native | 104 | 0.1% |
| Native Hawaiian / Pacific Islander | 34 | 0.0% |
| Two or More Races | 460 | 0.4% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 79,520 | 94.9% |
| Hispanic | 4,285 | 5.1% |
| White | 63,699 | 76.0% |
| Black | 13,048 | 15.6% |
| Asian | 1,236 | 1.5% |
| American Indian / Alaska Native | 1,371 | 1.6% |
| Native Hawaiian / Pacific Islander | 32 | 0.0% |
| Two or More Races | 283 | 0.3% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
