Overview
- District ID
- il-hd-106
- State
- Illinois
- Chamber
- Lower chamber
- District Code
- 106
- Land Area
- 2,777.1 sq mi
- Water Area
- 17.1 sq mi
Boundary
Boundary as GeoJSON
Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.
Counties
Showing all 8 counties
Places
Showing top 25 of 62 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 2 | 52,922 | 48.8% | 7.0% | 74.4% |
| IL District 16 | 52,122 | 48.1% | 6.9% | 25.5% |
| IL District 14 | 2,332 | 2.2% | 0.3% | 0.1% |
| IL District 1 | 1,018 | 0.9% | 0.1% | <0.1% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 78,682
- Active Voters
- 73,322 (93.2%)
Party Registration
This state's voter file does not record party registration.
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 16,226 (20.6%) | 0 (0.0%) | 244 (0.3%) |
| 2023–2024 | 52,852 (67.2%) | 2,582 (3.3%) | 12,476 (15.9%) |
| 2021–2022 | 39,739 (50.5%) | 2,109 (2.7%) | 13,077 (16.6%) |
| 2019–2020 | 48,029 (61.0%) | 5,817 (7.4%) | 9,053 (11.5%) |
| 2017–2018 | 35,015 (44.5%) | 4,167 (5.3%) | 9,867 (12.5%) |
| 2015–2016 | 39,165 (49.8%) | 6,423 (8.2%) | 16,772 (21.3%) |
| 2013–2014 | 27,404 (34.8%) | 1,070 (1.4%) | 10,298 (13.1%) |
| 2011–2012 | 31,149 (39.6%) | 1,601 (2.0%) | 9,901 (12.6%) |
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
- 105,859 (± 1,293)
- Median Age
- 41.2
- Median Household Income
- $72,441 (± $2,025)
- High School Graduate or Higher (age 25+)
- 91.8%
- Bachelor's Degree or Higher (age 25+)
- 19.1%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 23,838 | 22.5% |
| 18 to 64 | 61,086 | 57.7% |
| 65 and over | 20,935 | 19.8% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 9,596 | 9.1% |
| White, not Hispanic | 91,226 | 86.2% |
| Black, not Hispanic | 1,285 | 1.2% |
| Asian, not Hispanic | 450 | 0.4% |
| American Indian / Alaska Native, not Hispanic | 47 | 0.0% |
| Native Hawaiian / Pacific Islander, not Hispanic | 8 | 0.0% |
| Some other race, not Hispanic | 315 | 0.3% |
| Two or more races, not Hispanic | 2,932 | 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
- 104,361
- Citizen Voting Age Population (CVAP)
- 80,591
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 96,023 | 92.0% |
| Hispanic | 8,344 | 8.0% |
| White | 92,309 | 88.5% |
| Black | 1,237 | 1.2% |
| Asian | 320 | 0.3% |
| American Indian / Alaska Native | 50 | 0.0% |
| Native Hawaiian / Pacific Islander | 9 | 0.0% |
| Two or More Races | 171 | 0.2% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 75,463 | 93.6% |
| Hispanic | 5,131 | 6.4% |
| White | 73,050 | 90.6% |
| Black | 1,453 | 1.8% |
| Asian | 456 | 0.6% |
| American Indian / Alaska Native | 364 | 0.5% |
| Native Hawaiian / Pacific Islander | 13 | 0.0% |
| Two or More Races | 130 | 0.2% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
