Overview
- District ID
- il-hd-101
- State
- Illinois
- Chamber
- Lower chamber
- District Code
- 101
- Land Area
- 1,750.7 sq mi
- Water Area
- 3.47 sq mi
Boundary
Boundary as GeoJSON
Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.
Counties
Showing all 6 counties
Places
Showing top 25 of 40 places
Overlapping Congressional Districts
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 72,253
- Active Voters
- 70,257 (97.2%)
Party Registration
This state's voter file does not record party registration.
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 11,869 (16.4%) | <10 (—) | 0 (0.0%) |
| 2023–2024 | 51,241 (70.9%) | 2,629 (3.6%) | 8,612 (11.9%) |
| 2021–2022 | 39,171 (54.2%) | 3,439 (4.8%) | 15,829 (21.9%) |
| 2019–2020 | 45,796 (63.4%) | 6,049 (8.4%) | 10,175 (14.1%) |
| 2017–2018 | 34,509 (47.8%) | 4,159 (5.8%) | 12,039 (16.7%) |
| 2015–2016 | 37,863 (52.4%) | 6,215 (8.6%) | 16,608 (23.0%) |
| 2013–2014 | 26,276 (36.4%) | 1,687 (2.3%) | 10,825 (15.0%) |
| 2011–2012 | 30,336 (42.0%) | 1,592 (2.2%) | 10,179 (14.1%) |
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
- 109,246 (± 866)
- Median Age
- 38.3
- Median Household Income
- $72,280 (± $2,424)
- High School Graduate or Higher (age 25+)
- 92.0%
- Bachelor's Degree or Higher (age 25+)
- 28.6%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 25,558 | 23.4% |
| 18 to 64 | 64,433 | 59.0% |
| 65 and over | 19,255 | 17.6% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 6,018 | 5.5% |
| White, not Hispanic | 96,138 | 88.0% |
| Black, not Hispanic | 2,094 | 1.9% |
| Asian, not Hispanic | 1,516 | 1.4% |
| American Indian / Alaska Native, not Hispanic | 27 | 0.0% |
| Native Hawaiian / Pacific Islander, not Hispanic | 5 | 0.0% |
| Some other race, not Hispanic | 371 | 0.3% |
| Two or more races, not Hispanic | 3,077 | 2.8% |
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
- 107,637
- Citizen Voting Age Population (CVAP)
- 82,249
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 102,138 | 94.9% |
| Hispanic | 5,497 | 5.1% |
| White | 96,783 | 89.9% |
| Black | 2,039 | 1.9% |
| Asian | 1,021 | 0.9% |
| American Indian / Alaska Native | 27 | 0.0% |
| Native Hawaiian / Pacific Islander | 6 | 0.0% |
| Two or More Races | 462 | 0.4% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 78,939 | 96.0% |
| Hispanic | 3,315 | 4.0% |
| White | 75,362 | 91.6% |
| Black | 1,985 | 2.4% |
| Asian | 962 | 1.2% |
| American Indian / Alaska Native | 435 | 0.5% |
| Native Hawaiian / Pacific Islander | 4 | 0.0% |
| Two or More Races | 242 | 0.3% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).