Overview
- District ID
- il-sd-039
- State
- Illinois
- Chamber
- Upper chamber (state senate)
- District Code
- 039
- Land Area
- 45 sq mi
- Water Area
- 0.13 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 17 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
- 144,085
- Active Voters
- 136,517 (94.7%)
Party Registration
This state's voter file does not record party registration.
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 21,619 (15.0%) | 0 (0.0%) | 0 (0.0%) |
| 2023–2024 | 86,436 (60.0%) | 21,257 (14.8%) | 4,136 (2.9%) |
| 2021–2022 | 59,023 (41.0%) | 21,554 (15.0%) | 5,158 (3.6%) |
| 2019–2020 | 85,887 (59.6%) | 35,311 (24.5%) | 2,840 (2.0%) |
| 2017–2018 | 65,041 (45.1%) | 28,217 (19.6%) | 4,404 (3.1%) |
| 2015–2016 | 71,001 (49.3%) | 37,755 (26.2%) | 9,117 (6.3%) |
| 2013–2014 | 43,406 (30.1%) | 10,388 (7.2%) | 4,621 (3.2%) |
| 2011–2012 | 53,140 (36.9%) | 12,146 (8.4%) | 4,945 (3.4%) |
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
- 211,939 (± 3,140)
- Median Age
- 39.6
- Median Household Income
- $81,852 (± $2,586)
- High School Graduate or Higher (age 25+)
- 85.0%
- Bachelor's Degree or Higher (age 25+)
- 36.2%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 47,888 | 22.6% |
| 18 to 64 | 128,942 | 60.8% |
| 65 and over | 35,109 | 16.6% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 83,039 | 39.2% |
| White, not Hispanic | 82,846 | 39.1% |
| Black, not Hispanic | 32,460 | 15.3% |
| Asian, not Hispanic | 7,406 | 3.5% |
| American Indian / Alaska Native, not Hispanic | 149 | 0.1% |
| Native Hawaiian / Pacific Islander, not Hispanic | 16 | 0.0% |
| Some other race, not Hispanic | 427 | 0.2% |
| Two or more races, not Hispanic | 5,596 | 2.6% |
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
- 186,842
- Citizen Voting Age Population (CVAP)
- 140,370
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 122,669 | 65.7% |
| Hispanic | 64,172 | 34.3% |
| White | 79,395 | 42.5% |
| Black | 32,381 | 17.3% |
| Asian | 6,188 | 3.3% |
| American Indian / Alaska Native | 150 | 0.1% |
| Native Hawaiian / Pacific Islander | 13 | 0.0% |
| Two or More Races | 798 | 0.4% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 99,732 | 71.0% |
| Hispanic | 40,640 | 29.0% |
| White | 65,367 | 46.6% |
| Black | 27,489 | 19.6% |
| Asian | 6,044 | 4.3% |
| American Indian / Alaska Native | 579 | 0.4% |
| Native Hawaiian / Pacific Islander | 17 | 0.0% |
| Two or More Races | 403 | 0.3% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
