Overview
- District ID
- il-hd-091
- State
- Illinois
- Chamber
- Lower chamber
- District Code
- 091
- Land Area
- 254.4 sq mi
- Water Area
- 4.83 sq mi
Boundary
Boundary as GeoJSON
Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.
Counties
Showing all 4 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 17 | 79,292 | 73.1% | 10.5% | 13.1% |
| IL District 16 | 29,196 | 26.9% | 3.9% | 86.9% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 75,046
- Active Voters
- 67,230 (89.6%)
Party Registration
This state's voter file does not record party registration.
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 16,493 (22.0%) | 0 (0.0%) | <10 (—) |
| 2023–2024 | 50,589 (67.4%) | 4,234 (5.6%) | 5,075 (6.8%) |
| 2021–2022 | 34,324 (45.7%) | 5,891 (7.8%) | 8,073 (10.8%) |
| 2019–2020 | 41,178 (54.9%) | 10,257 (13.7%) | 5,013 (6.7%) |
| 2017–2018 | 30,852 (41.1%) | 6,807 (9.1%) | 6,372 (8.5%) |
| 2015–2016 | 32,185 (42.9%) | 9,271 (12.4%) | 11,240 (15.0%) |
| 2013–2014 | 19,650 (26.2%) | 1,803 (2.4%) | 7,078 (9.4%) |
| 2011–2012 | 24,829 (33.1%) | 1,404 (1.9%) | 6,561 (8.7%) |
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
- 109,577 (± 2,099)
- Median Age
- 32.2
- Median Household Income
- $62,728 (± $3,105)
- High School Graduate or Higher (age 25+)
- 95.4%
- Bachelor's Degree or Higher (age 25+)
- 38.6%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 18,895 | 17.2% |
| 18 to 64 | 73,968 | 67.5% |
| 65 and over | 16,714 | 15.3% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 7,925 | 7.2% |
| White, not Hispanic | 83,915 | 76.6% |
| Black, not Hispanic | 10,967 | 10.0% |
| Asian, not Hispanic | 2,562 | 2.3% |
| American Indian / Alaska Native, not Hispanic | 22 | 0.0% |
| Native Hawaiian / Pacific Islander, not Hispanic | 0 | 0.0% |
| Some other race, not Hispanic | 252 | 0.2% |
| Two or more races, not Hispanic | 3,934 | 3.6% |
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
- 106,237
- Citizen Voting Age Population (CVAP)
- 87,810
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 99,600 | 93.8% |
| Hispanic | 6,638 | 6.2% |
| White | 84,193 | 79.3% |
| Black | 10,601 | 10.0% |
| Asian | 1,546 | 1.5% |
| American Indian / Alaska Native | 24 | 0.0% |
| Native Hawaiian / Pacific Islander | 0 | 0.0% |
| Two or More Races | 304 | 0.3% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 83,402 | 95.0% |
| Hispanic | 4,409 | 5.0% |
| White | 72,142 | 82.2% |
| Black | 8,877 | 10.1% |
| Asian | 1,815 | 2.1% |
| American Indian / Alaska Native | 370 | 0.4% |
| Native Hawaiian / Pacific Islander | 0 | 0.0% |
| Two or More Races | 245 | 0.3% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
