Overview
- District ID
- il-hd-037
- State
- Illinois
- Chamber
- Lower chamber
- District Code
- 037
- Land Area
- 77.5 sq mi
- Water Area
- 0.22 sq mi
Boundary
Boundary as GeoJSON
Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.
Counties
| County | Overlap | Share of district land | Share of county land |
|---|
| Will County | 67.74 sq mi | 87.4% | 8.1% |
| Cook County | 9.79 sq mi | 12.6% | 1.0% |
Showing all 2 counties
Places
Showing all 13 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 1 | 94,673 | 87.2% | 12.6% | 94.6% |
| IL District 6 | 13,902 | 12.8% | 1.8% | 5.4% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 84,093
- Active Voters
- 81,018 (96.3%)
Party Registration
This state's voter file does not record party registration.
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 17,279 (20.5%) | <10 (—) | 3,459 (4.1%) |
| 2023–2024 | 61,049 (72.6%) | 6,614 (7.9%) | 8,577 (10.2%) |
| 2021–2022 | 45,769 (54.4%) | 6,209 (7.4%) | 10,938 (13.0%) |
| 2019–2020 | 58,944 (70.1%) | 12,795 (15.2%) | 5,621 (6.7%) |
| 2017–2018 | 42,504 (50.5%) | 9,604 (11.4%) | 8,205 (9.8%) |
| 2015–2016 | 46,605 (55.4%) | 11,681 (13.9%) | 15,139 (18.0%) |
| 2013–2014 | 30,737 (36.6%) | 1,906 (2.3%) | 7,774 (9.2%) |
| 2011–2012 | 37,104 (44.1%) | 2,961 (3.5%) | 8,635 (10.3%) |
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
- 108,055 (± 1,789)
- Median Age
- 42.1
- Median Household Income
- $124,286 (± $4,285)
- High School Graduate or Higher (age 25+)
- 96.2%
- Bachelor's Degree or Higher (age 25+)
- 43.1%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 25,203 | 23.3% |
| 18 to 64 | 62,978 | 58.3% |
| 65 and over | 19,874 | 18.4% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 8,848 | 8.2% |
| White, not Hispanic | 91,689 | 84.9% |
| Black, not Hispanic | 2,496 | 2.3% |
| Asian, not Hispanic | 1,954 | 1.8% |
| American Indian / Alaska Native, not Hispanic | 7 | 0.0% |
| Native Hawaiian / Pacific Islander, not Hispanic | 5 | 0.0% |
| Some other race, not Hispanic | 142 | 0.1% |
| Two or more races, not Hispanic | 2,914 | 2.7% |
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
- 105,991
- Citizen Voting Age Population (CVAP)
- 81,003
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 97,781 | 92.3% |
| Hispanic | 8,210 | 7.7% |
| White | 91,822 | 86.6% |
| Black | 2,498 | 2.4% |
| Asian | 1,855 | 1.8% |
| American Indian / Alaska Native | 7 | 0.0% |
| Native Hawaiian / Pacific Islander | 6 | 0.0% |
| Two or More Races | 77 | 0.1% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 75,601 | 93.3% |
| Hispanic | 5,400 | 6.7% |
| White | 71,122 | 87.8% |
| Black | 2,342 | 2.9% |
| Asian | 1,847 | 2.3% |
| American Indian / Alaska Native | 316 | 0.4% |
| Native Hawaiian / Pacific Islander | 6 | 0.0% |
| Two or More Races | 48 | 0.1% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
