Illinois State Senate District 20

State Legislative District Profile (Upper Chamber)

Overview

District ID
il-sd-020
State
Illinois
Chamber
Upper chamber (state senate)
District Code
020
Land Area
10.7 sq mi
Water Area
0.1 sq mi

Boundary

Boundary of Illinois State Senate District 20

Boundary as GeoJSON

Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.

Counties

CountyOverlapShare of district landShare of county land
Cook County10.68 sq mi100.0%1.1%

Showing all 1 county

Places

PlaceOverlapShare of district landShare of place land
Chicago city10.68 sq mi100.0%4.7%

Showing all 1 place

Overlapping Congressional Districts

Congressional districtPopulation in bothShare of this district's populationShare of the congressional district's populationShare of this district's land
IL District 3193,07188.9%25.6%83.2%
IL District 524,02311.1%3.2%16.8%

Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).

Voters

Registered Voters
135,870
Active Voters
116,924 (86.1%)

Party Registration

This state's voter file does not record party registration.

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2025–202639 (0.0%)<10 (—)0 (0.0%)
2023–202482,513 (60.7%)26,507 (19.5%)2,625 (1.9%)
2021–202251,654 (38.0%)21,603 (15.9%)1,828 (1.3%)
2019–202080,415 (59.2%)36,971 (27.2%)1,165 (0.9%)
2017–201856,604 (41.7%)24,177 (17.8%)1,535 (1.1%)
2015–201660,072 (44.2%)35,189 (25.9%)4,269 (3.1%)
2013–201426,026 (19.2%)8,338 (6.1%)1,452 (1.1%)
2011–201237,272 (27.4%)7,191 (5.3%)1,706 (1.3%)

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
212,013 (± 5,139)
Median Age
34.7
Median Household Income
$91,311 (± $2,274)
High School Graduate or Higher (age 25+)
85.8%
Bachelor's Degree or Higher (age 25+)
48.4%

Population by Age

GroupPeopleShare
Under 1842,24219.9%
18 to 64147,16669.4%
65 and over22,60510.7%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)99,24146.8%
White, not Hispanic81,86338.6%
Black, not Hispanic8,8564.2%
Asian, not Hispanic13,8746.5%
American Indian / Alaska Native, not Hispanic2000.1%
Native Hawaiian / Pacific Islander, not Hispanic1120.1%
Some other race, not Hispanic6960.3%
Two or more races, not Hispanic7,1713.4%

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
181,415
Citizen Voting Age Population (CVAP)
141,091

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic104,32257.5%
Hispanic77,09542.5%
White78,67643.4%
Black8,8514.9%
Asian11,0746.1%
American Indian / Alaska Native1940.1%
Native Hawaiian / Pacific Islander940.1%
Two or More Races6340.3%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic86,77661.5%
Hispanic54,31338.5%
White66,62347.2%
Black8,0375.7%
Asian11,1307.9%
American Indian / Alaska Native6700.5%
Native Hawaiian / Pacific Islander860.1%
Two or More Races3290.2%

Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).