Overview
- District ID
- il-hd-048
- State
- Illinois
- Chamber
- Lower chamber
- District Code
- 048
- Land Area
- 36.3 sq mi
- Water Area
- 1.1 sq mi
Boundary
Boundary as GeoJSON
Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.
Counties
Showing all 2 counties
Places
Showing all 10 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 8 | 100,966 | 93.0% | 13.4% | 92.0% |
| IL District 3 | 7,602 | 7.0% | 1.0% | 8.0% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 81,599
- Active Voters
- 76,561 (93.8%)
Party Registration
This state's voter file does not record party registration.
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 12,886 (15.8%) | <10 (—) | 0 (0.0%) |
| 2023–2024 | 53,876 (66.0%) | 6,596 (8.1%) | 6,817 (8.4%) |
| 2021–2022 | 37,535 (46.0%) | 6,566 (8.0%) | 7,764 (9.5%) |
| 2019–2020 | 51,465 (63.1%) | 10,667 (13.1%) | 4,388 (5.4%) |
| 2017–2018 | 35,660 (43.7%) | 7,363 (9.0%) | 6,636 (8.1%) |
| 2015–2016 | 40,369 (49.5%) | 11,454 (14.0%) | 12,256 (15.0%) |
| 2013–2014 | 24,924 (30.5%) | 1,905 (2.3%) | 7,385 (9.1%) |
| 2011–2012 | 31,469 (38.6%) | 3,054 (3.7%) | 6,970 (8.5%) |
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
- 107,797 (± 2,109)
- Median Age
- 43.2
- Median Household Income
- $105,783 (± $4,335)
- High School Graduate or Higher (age 25+)
- 92.0%
- Bachelor's Degree or Higher (age 25+)
- 41.8%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 22,156 | 20.6% |
| 18 to 64 | 64,658 | 60.0% |
| 65 and over | 20,983 | 19.5% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 15,801 | 14.7% |
| White, not Hispanic | 71,765 | 66.6% |
| Black, not Hispanic | 2,377 | 2.2% |
| Asian, not Hispanic | 13,883 | 12.9% |
| American Indian / Alaska Native, not Hispanic | 4 | 0.0% |
| Native Hawaiian / Pacific Islander, not Hispanic | 99 | 0.1% |
| Some other race, not Hispanic | 258 | 0.2% |
| Two or more races, not Hispanic | 3,610 | 3.3% |
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
- 100,226
- Citizen Voting Age Population (CVAP)
- 78,411
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 86,553 | 86.4% |
| Hispanic | 13,675 | 13.6% |
| White | 70,187 | 70.0% |
| Black | 2,364 | 2.4% |
| Asian | 11,681 | 11.7% |
| American Indian / Alaska Native | 2 | 0.0% |
| Native Hawaiian / Pacific Islander | 141 | 0.1% |
| Two or More Races | 292 | 0.3% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 70,006 | 89.3% |
| Hispanic | 8,407 | 10.7% |
| White | 57,798 | 73.7% |
| Black | 2,146 | 2.7% |
| Asian | 9,475 | 12.1% |
| American Indian / Alaska Native | 265 | 0.3% |
| Native Hawaiian / Pacific Islander | 108 | 0.1% |
| Two or More Races | 209 | 0.3% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
