Overview
- District ID
- il-sd-034
- State
- Illinois
- Chamber
- Upper chamber (state senate)
- District Code
- 034
- Land Area
- 133.6 sq mi
- Water Area
- 2.54 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 6 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 17 | 146,019 | 67.3% | 19.4% | 41.1% |
| IL District 16 | 47,639 | 22.0% | 6.3% | 53.4% |
| IL District 11 | 23,250 | 10.7% | 3.1% | 5.5% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 152,668
- Active Voters
- 133,043 (87.1%)
Party Registration
This state's voter file does not record party registration.
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 22,507 (14.7%) | 5,470 (3.6%) | 213 (0.1%) |
| 2023–2024 | 80,807 (52.9%) | 7,752 (5.1%) | 8,103 (5.3%) |
| 2021–2022 | 56,349 (36.9%) | 9,776 (6.4%) | 12,296 (8.1%) |
| 2019–2020 | 75,714 (49.6%) | 18,349 (12.0%) | 9,482 (6.2%) |
| 2017–2018 | 57,845 (37.9%) | 14,921 (9.8%) | 14,130 (9.3%) |
| 2015–2016 | 63,699 (41.7%) | 18,924 (12.4%) | 17,954 (11.8%) |
| 2013–2014 | 39,212 (25.7%) | 3,740 (2.4%) | 9,413 (6.2%) |
| 2011–2012 | 50,736 (33.2%) | 6,239 (4.1%) | 11,262 (7.4%) |
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
- 215,214 (± 1,471)
- Median Age
- 38.3
- Median Household Income
- $58,175 (± $1,852)
- High School Graduate or Higher (age 25+)
- 85.5%
- Bachelor's Degree or Higher (age 25+)
- 21.4%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 50,157 | 23.3% |
| 18 to 64 | 126,304 | 58.7% |
| 65 and over | 38,753 | 18.0% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 45,227 | 21.0% |
| White, not Hispanic | 119,447 | 55.5% |
| Black, not Hispanic | 31,448 | 14.6% |
| Asian, not Hispanic | 6,541 | 3.0% |
| American Indian / Alaska Native, not Hispanic | 303 | 0.1% |
| Native Hawaiian / Pacific Islander, not Hispanic | 71 | 0.0% |
| Some other race, not Hispanic | 724 | 0.3% |
| Two or more races, not Hispanic | 11,453 | 5.3% |
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
- 201,408
- Citizen Voting Age Population (CVAP)
- 152,833
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 164,490 | 81.7% |
| Hispanic | 36,912 | 18.3% |
| White | 119,564 | 59.4% |
| Black | 30,280 | 15.0% |
| Asian | 4,743 | 2.4% |
| American Indian / Alaska Native | 295 | 0.1% |
| Native Hawaiian / Pacific Islander | 58 | 0.0% |
| Two or More Races | 716 | 0.4% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 130,902 | 85.7% |
| Hispanic | 21,929 | 14.3% |
| White | 101,251 | 66.2% |
| Black | 22,946 | 15.0% |
| Asian | 3,966 | 2.6% |
| American Indian / Alaska Native | 2,427 | 1.6% |
| Native Hawaiian / Pacific Islander | 49 | 0.0% |
| Two or More Races | 371 | 0.2% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
