Overview
- District ID
- il-sd-037
- State
- Illinois
- Chamber
- Upper chamber (state senate)
- District Code
- 037
- Land Area
- 3,560.9 sq mi
- Water Area
- 37.5 sq mi
Boundary
Boundary as GeoJSON
Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.
Counties
Showing all 12 counties
Places
Showing top 25 of 84 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 16 | 130,950 | 60.3% | 17.4% | 60.3% |
| IL District 17 | 63,112 | 29.1% | 8.4% | 22.3% |
| IL District 14 | 22,967 | 10.6% | 3.0% | 17.4% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 155,675
- Active Voters
- 144,719 (93.0%)
Party Registration
This state's voter file does not record party registration.
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 28,528 (18.3%) | 20 (0.0%) | 730 (0.5%) |
| 2023–2024 | 106,758 (68.6%) | 6,874 (4.4%) | 19,560 (12.6%) |
| 2021–2022 | 80,577 (51.8%) | 7,507 (4.8%) | 21,680 (13.9%) |
| 2019–2020 | 98,040 (63.0%) | 15,898 (10.2%) | 11,704 (7.5%) |
| 2017–2018 | 74,826 (48.1%) | 10,814 (6.9%) | 19,441 (12.5%) |
| 2015–2016 | 80,868 (51.9%) | 16,256 (10.4%) | 29,380 (18.9%) |
| 2013–2014 | 56,199 (36.1%) | 3,429 (2.2%) | 18,601 (11.9%) |
| 2011–2012 | 67,423 (43.3%) | 4,127 (2.7%) | 17,396 (11.2%) |
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
- 215,356 (± 1,581)
- Median Age
- 42.0
- Median Household Income
- $76,363 (± $1,823)
- High School Graduate or Higher (age 25+)
- 92.6%
- Bachelor's Degree or Higher (age 25+)
- 27.5%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 47,759 | 22.2% |
| 18 to 64 | 122,748 | 57.0% |
| 65 and over | 44,849 | 20.8% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 20,749 | 9.6% |
| White, not Hispanic | 177,337 | 82.3% |
| Black, not Hispanic | 4,701 | 2.2% |
| Asian, not Hispanic | 4,543 | 2.1% |
| American Indian / Alaska Native, not Hispanic | 56 | 0.0% |
| Native Hawaiian / Pacific Islander, not Hispanic | 3 | 0.0% |
| Some other race, not Hispanic | 830 | 0.4% |
| Two or more races, not Hispanic | 7,137 | 3.3% |
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
- 210,777
- Citizen Voting Age Population (CVAP)
- 163,251
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 192,454 | 91.3% |
| Hispanic | 18,325 | 8.7% |
| White | 179,701 | 85.3% |
| Black | 4,856 | 2.3% |
| Asian | 3,215 | 1.5% |
| American Indian / Alaska Native | 58 | 0.0% |
| Native Hawaiian / Pacific Islander | 0 | 0.0% |
| Two or More Races | 479 | 0.2% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 151,807 | 93.0% |
| Hispanic | 11,447 | 7.0% |
| White | 143,871 | 88.1% |
| Black | 4,522 | 2.8% |
| Asian | 2,360 | 1.4% |
| American Indian / Alaska Native | 850 | 0.5% |
| Native Hawaiian / Pacific Islander | 4 | 0.0% |
| Two or More Races | 270 | 0.2% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
