Overview
- District ID
- il-hd-102
- State
- Illinois
- Chamber
- Lower chamber
- District Code
- 102
- Land Area
- 3,367.9 sq mi
- Water Area
- 13.5 sq mi
Boundary
Boundary as GeoJSON
Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.
Counties
Showing all 11 counties
Places
Showing top 25 of 56 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 12 | 71,943 | 66.3% | 9.5% | 68.6% |
| IL District 15 | 33,809 | 31.1% | 4.5% | 30.4% |
| IL District 2 | 2,834 | 2.6% | 0.4% | 1.0% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 76,764
- Active Voters
- 73,489 (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 | 14,478 (18.9%) | <10 (—) | 0 (0.0%) |
| 2023–2024 | 54,057 (70.4%) | 2,488 (3.2%) | 14,823 (19.3%) |
| 2021–2022 | 42,699 (55.6%) | 2,396 (3.1%) | 17,656 (23.0%) |
| 2019–2020 | 49,890 (65.0%) | 5,375 (7.0%) | 15,002 (19.5%) |
| 2017–2018 | 37,462 (48.8%) | 4,060 (5.3%) | 14,437 (18.8%) |
| 2015–2016 | 42,104 (54.8%) | 5,759 (7.5%) | 18,753 (24.4%) |
| 2013–2014 | 31,042 (40.4%) | 2,844 (3.7%) | 10,681 (13.9%) |
| 2011–2012 | 35,169 (45.8%) | 2,210 (2.9%) | 10,366 (13.5%) |
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
- 107,295 (± 773)
- Median Age
- 42.6
- Median Household Income
- $69,567 (± $2,870)
- High School Graduate or Higher (age 25+)
- 91.4%
- Bachelor's Degree or Higher (age 25+)
- 20.9%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 23,453 | 21.9% |
| 18 to 64 | 61,821 | 57.6% |
| 65 and over | 22,021 | 20.5% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 2,108 | 2.0% |
| White, not Hispanic | 99,239 | 92.5% |
| Black, not Hispanic | 2,063 | 1.9% |
| Asian, not Hispanic | 319 | 0.3% |
| American Indian / Alaska Native, not Hispanic | 131 | 0.1% |
| Native Hawaiian / Pacific Islander, not Hispanic | 8 | 0.0% |
| Some other race, not Hispanic | 96 | 0.1% |
| Two or more races, not Hispanic | 3,331 | 3.1% |
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
- 106,680
- Citizen Voting Age Population (CVAP)
- 83,315
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 104,893 | 98.3% |
| Hispanic | 1,788 | 1.7% |
| White | 99,501 | 93.3% |
| Black | 2,048 | 1.9% |
| Asian | 238 | 0.2% |
| American Indian / Alaska Native | 128 | 0.1% |
| Native Hawaiian / Pacific Islander | 9 | 0.0% |
| Two or More Races | 141 | 0.1% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 82,144 | 98.6% |
| Hispanic | 1,172 | 1.4% |
| White | 77,832 | 93.4% |
| Black | 2,137 | 2.6% |
| Asian | 379 | 0.5% |
| American Indian / Alaska Native | 1,708 | 2.1% |
| Native Hawaiian / Pacific Islander | 11 | 0.0% |
| Two or More Races | 94 | 0.1% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
