Overview
- District ID
- il-sd-033
- State
- Illinois
- Chamber
- Upper chamber (state senate)
- District Code
- 033
- Land Area
- 178.8 sq mi
- Water Area
- 3.07 sq mi
Boundary
Boundary as GeoJSON
Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.
Counties
Showing all 3 counties
Places
Showing all 21 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 | 127,824 | 58.9% | 17.0% | 43.9% |
| IL District 11 | 50,094 | 23.1% | 6.6% | 46.2% |
| IL District 9 | 35,262 | 16.2% | 4.7% | 7.5% |
| IL District 3 | 4,007 | 1.8% | 0.5% | 2.4% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 156,624
- Active Voters
- 145,688 (93.0%)
Party Registration
This state's voter file does not record party registration.
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 34,647 (22.1%) | <10 (—) | 716 (0.5%) |
| 2023–2024 | 115,197 (73.6%) | 10,985 (7.0%) | 13,298 (8.5%) |
| 2021–2022 | 81,284 (51.9%) | 12,433 (7.9%) | 16,431 (10.5%) |
| 2019–2020 | 103,911 (66.3%) | 22,134 (14.1%) | 10,905 (7.0%) |
| 2017–2018 | 76,087 (48.6%) | 14,857 (9.5%) | 14,877 (9.5%) |
| 2015–2016 | 79,325 (50.6%) | 18,573 (11.9%) | 24,849 (15.9%) |
| 2013–2014 | 47,452 (30.3%) | 1,768 (1.1%) | 13,381 (8.5%) |
| 2011–2012 | 59,018 (37.7%) | 2,926 (1.9%) | 13,802 (8.8%) |
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
- 217,820 (± 2,888)
- Median Age
- 40.8
- Median Household Income
- $122,023 (± $3,511)
- High School Graduate or Higher (age 25+)
- 94.1%
- Bachelor's Degree or Higher (age 25+)
- 45.8%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 48,747 | 22.4% |
| 18 to 64 | 134,686 | 61.8% |
| 65 and over | 34,387 | 15.8% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 36,322 | 16.7% |
| White, not Hispanic | 152,426 | 70.0% |
| Black, not Hispanic | 5,467 | 2.5% |
| Asian, not Hispanic | 14,080 | 6.5% |
| American Indian / Alaska Native, not Hispanic | 150 | 0.1% |
| Native Hawaiian / Pacific Islander, not Hispanic | 86 | 0.0% |
| Some other race, not Hispanic | 786 | 0.4% |
| Two or more races, not Hispanic | 8,503 | 3.9% |
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
- 208,162
- Citizen Voting Age Population (CVAP)
- 159,944
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 176,856 | 85.0% |
| Hispanic | 31,305 | 15.0% |
| White | 153,111 | 73.6% |
| Black | 5,414 | 2.6% |
| Asian | 12,384 | 5.9% |
| American Indian / Alaska Native | 150 | 0.1% |
| Native Hawaiian / Pacific Islander | 55 | 0.0% |
| Two or More Races | 448 | 0.2% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 140,254 | 87.7% |
| Hispanic | 19,687 | 12.3% |
| White | 123,801 | 77.4% |
| Black | 5,008 | 3.1% |
| Asian | 10,539 | 6.6% |
| American Indian / Alaska Native | 676 | 0.4% |
| Native Hawaiian / Pacific Islander | 45 | 0.0% |
| Two or More Races | 268 | 0.2% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
