Overview
- District ID
- il-sd-004
- State
- Illinois
- Chamber
- Upper chamber (state senate)
- District Code
- 004
- Land Area
- 41.6 sq mi
- Water Area
- 0.19 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 25 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 7 | 158,568 | 73.0% | 21.0% | 57.0% |
| IL District 4 | 41,640 | 19.2% | 5.5% | 30.9% |
| IL District 6 | 14,957 | 6.9% | 2.0% | 11.6% |
| IL District 3 | 1,979 | 0.9% | 0.3% | 0.4% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 155,956
- Active Voters
- 146,159 (93.7%)
Party Registration
This state's voter file does not record party registration.
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 25,328 (16.2%) | <10 (—) | 0 (0.0%) |
| 2023–2024 | 91,342 (58.6%) | 23,107 (14.8%) | 3,537 (2.3%) |
| 2021–2022 | 64,180 (41.2%) | 22,681 (14.5%) | 5,262 (3.4%) |
| 2019–2020 | 94,043 (60.3%) | 40,241 (25.8%) | 2,936 (1.9%) |
| 2017–2018 | 72,136 (46.3%) | 32,154 (20.6%) | 4,788 (3.1%) |
| 2015–2016 | 81,023 (52.0%) | 44,762 (28.7%) | 10,104 (6.5%) |
| 2013–2014 | 51,100 (32.8%) | 11,128 (7.1%) | 5,500 (3.5%) |
| 2011–2012 | 65,345 (41.9%) | 15,044 (9.6%) | 5,824 (3.7%) |
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
- 211,363 (± 3,474)
- Median Age
- 40.0
- Median Household Income
- $75,214 (± $3,218)
- High School Graduate or Higher (age 25+)
- 87.1%
- Bachelor's Degree or Higher (age 25+)
- 32.0%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 49,416 | 23.4% |
| 18 to 64 | 125,674 | 59.5% |
| 65 and over | 36,273 | 17.2% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 49,475 | 23.4% |
| White, not Hispanic | 60,896 | 28.8% |
| Black, not Hispanic | 90,521 | 42.8% |
| Asian, not Hispanic | 4,545 | 2.2% |
| American Indian / Alaska Native, not Hispanic | 61 | 0.0% |
| Native Hawaiian / Pacific Islander, not Hispanic | 17 | 0.0% |
| Some other race, not Hispanic | 910 | 0.4% |
| Two or more races, not Hispanic | 4,938 | 2.3% |
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
- 197,660
- Citizen Voting Age Population (CVAP)
- 149,082
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 159,300 | 80.6% |
| Hispanic | 38,363 | 19.4% |
| White | 60,434 | 30.6% |
| Black | 90,946 | 46.0% |
| Asian | 3,861 | 2.0% |
| American Indian / Alaska Native | 61 | 0.0% |
| Native Hawaiian / Pacific Islander | 17 | 0.0% |
| Two or More Races | 560 | 0.3% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 125,794 | 84.4% |
| Hispanic | 23,285 | 15.6% |
| White | 49,013 | 32.9% |
| Black | 72,893 | 48.9% |
| Asian | 3,363 | 2.3% |
| American Indian / Alaska Native | 554 | 0.4% |
| Native Hawaiian / Pacific Islander | 17 | 0.0% |
| Two or More Races | 227 | 0.2% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
