Overview
- District ID
- il-sd-023
- State
- Illinois
- Chamber
- Upper chamber (state senate)
- District Code
- 023
- Land Area
- 56.5 sq mi
- Water Area
- 1.23 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 17 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 6 | 115,193 | 53.0% | 15.3% | 51.3% |
| IL District 3 | 38,690 | 17.8% | 5.1% | 20.8% |
| IL District 8 | 37,352 | 17.2% | 5.0% | 16.2% |
| IL District 4 | 25,912 | 11.9% | 3.4% | 11.7% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 156,805
- Active Voters
- 143,275 (91.4%)
Party Registration
This state's voter file does not record party registration.
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 33,675 (21.5%) | <10 (—) | <10 (—) |
| 2023–2024 | 101,048 (64.4%) | 14,831 (9.5%) | 9,797 (6.2%) |
| 2021–2022 | 72,319 (46.1%) | 14,837 (9.5%) | 13,829 (8.8%) |
| 2019–2020 | 97,005 (61.9%) | 23,379 (14.9%) | 6,892 (4.4%) |
| 2017–2018 | 71,141 (45.4%) | 16,110 (10.3%) | 11,881 (7.6%) |
| 2015–2016 | 76,106 (48.5%) | 22,587 (14.4%) | 22,748 (14.5%) |
| 2013–2014 | 47,007 (30.0%) | 2,723 (1.7%) | 13,239 (8.4%) |
| 2011–2012 | 58,153 (37.1%) | 4,938 (3.1%) | 14,593 (9.3%) |
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
- 215,620 (± 2,550)
- Median Age
- 40.3
- Median Household Income
- $105,301 (± $2,796)
- High School Graduate or Higher (age 25+)
- 91.3%
- Bachelor's Degree or Higher (age 25+)
- 47.7%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 47,538 | 22.0% |
| 18 to 64 | 130,528 | 60.5% |
| 65 and over | 37,554 | 17.4% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 43,771 | 20.3% |
| White, not Hispanic | 123,622 | 57.3% |
| Black, not Hispanic | 9,607 | 4.5% |
| Asian, not Hispanic | 30,566 | 14.2% |
| American Indian / Alaska Native, not Hispanic | 21 | 0.0% |
| Native Hawaiian / Pacific Islander, not Hispanic | 19 | 0.0% |
| Some other race, not Hispanic | 1,038 | 0.5% |
| Two or more races, not Hispanic | 6,976 | 3.2% |
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
- 195,928
- Citizen Voting Age Population (CVAP)
- 150,046
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 161,315 | 82.3% |
| Hispanic | 34,609 | 17.7% |
| White | 122,769 | 62.7% |
| Black | 9,131 | 4.7% |
| Asian | 24,863 | 12.7% |
| American Indian / Alaska Native | 20 | 0.0% |
| Native Hawaiian / Pacific Islander | 17 | 0.0% |
| Two or More Races | 554 | 0.3% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 128,029 | 85.3% |
| Hispanic | 22,015 | 14.7% |
| White | 99,596 | 66.4% |
| Black | 7,644 | 5.1% |
| Asian | 20,025 | 13.3% |
| American Indian / Alaska Native | 371 | 0.2% |
| Native Hawaiian / Pacific Islander | 19 | 0.0% |
| Two or More Races | 409 | 0.3% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
