Overview
- District ID
- il-sd-018
- State
- Illinois
- Chamber
- Upper chamber (state senate)
- District Code
- 018
- Land Area
- 63.6 sq mi
- Water Area
- 1.99 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 |
|---|
| Cook County | 63.55 sq mi | 100.0% | 6.7% |
Showing all 1 county
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 6 | 180,202 | 82.9% | 23.9% | 91.0% |
| IL District 1 | 37,116 | 17.1% | 4.9% | 9.0% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 163,904
- Active Voters
- 156,924 (95.7%)
Party Registration
This state's voter file does not record party registration.
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 19,913 (12.1%) | <10 (—) | 0 (0.0%) |
| 2023–2024 | 107,139 (65.4%) | 29,625 (18.1%) | 8,830 (5.4%) |
| 2021–2022 | 77,811 (47.5%) | 22,648 (13.8%) | 12,139 (7.4%) |
| 2019–2020 | 106,084 (64.7%) | 43,324 (26.4%) | 5,061 (3.1%) |
| 2017–2018 | 80,739 (49.3%) | 35,665 (21.8%) | 8,856 (5.4%) |
| 2015–2016 | 89,518 (54.6%) | 42,017 (25.6%) | 18,133 (11.1%) |
| 2013–2014 | 59,945 (36.6%) | 11,451 (7.0%) | 9,863 (6.0%) |
| 2011–2012 | 71,695 (43.7%) | 16,313 (10.0%) | 10,080 (6.1%) |
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
- 215,786 (± 3,509)
- Median Age
- 41.7
- Median Household Income
- $90,813 (± $3,249)
- High School Graduate or Higher (age 25+)
- 92.5%
- Bachelor's Degree or Higher (age 25+)
- 37.7%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 47,844 | 22.2% |
| 18 to 64 | 124,131 | 57.5% |
| 65 and over | 43,811 | 20.3% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 33,136 | 15.4% |
| White, not Hispanic | 132,789 | 61.5% |
| Black, not Hispanic | 36,746 | 17.0% |
| Asian, not Hispanic | 4,449 | 2.1% |
| American Indian / Alaska Native, not Hispanic | 186 | 0.1% |
| Native Hawaiian / Pacific Islander, not Hispanic | 0 | 0.0% |
| Some other race, not Hispanic | 877 | 0.4% |
| Two or more races, not Hispanic | 7,603 | 3.5% |
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
- 206,602
- Citizen Voting Age Population (CVAP)
- 159,518
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 176,763 | 85.6% |
| Hispanic | 29,834 | 14.4% |
| White | 130,598 | 63.2% |
| Black | 36,763 | 17.8% |
| Asian | 4,064 | 2.0% |
| American Indian / Alaska Native | 185 | 0.1% |
| Native Hawaiian / Pacific Islander | 0 | 0.0% |
| Two or More Races | 629 | 0.3% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 140,589 | 88.1% |
| Hispanic | 18,934 | 11.9% |
| White | 104,271 | 65.4% |
| Black | 30,942 | 19.4% |
| Asian | 4,054 | 2.5% |
| American Indian / Alaska Native | 1,135 | 0.7% |
| Native Hawaiian / Pacific Islander | 1 | 0.0% |
| Two or More Races | 485 | 0.3% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
