Illinois State House District 27

State Legislative District Profile (Lower Chamber)

Overview

District ID
il-hd-027
State
Illinois
Chamber
Lower chamber
District Code
027
Land Area
30.7 sq mi
Water Area
0.34 sq mi

Boundary

Boundary of Illinois State House District 27

Boundary as GeoJSON

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

Counties

CountyOverlapShare of district landShare of county land
Cook County29.73 sq mi96.7%3.1%
Will County1.01 sq mi3.3%0.1%

Showing all 2 counties

Places

PlaceOverlapShare of district landShare of place land
Orland Park village10.50 sq mi34.2%47.7%
Chicago city7.50 sq mi24.4%3.3%
Crestwood village1.64 sq mi5.3%53.8%
Alsip village1.63 sq mi5.3%24.9%
Tinley Park village1.09 sq mi3.5%6.7%
Homer Glen village1.01 sq mi3.3%4.6%
Blue Island city0.86 sq mi2.8%21.2%
Orland Hills village0.07 sq mi0.2%6.0%
Oak Forest city0.05 sq mi0.2%0.8%
Midlothian village0.04 sq mi0.1%1.5%

Showing all 10 places

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 163,64458.6%8.4%34.7%
IL District 644,05740.6%5.8%65.0%
IL District 29040.8%0.1%0.3%

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

Voters

Registered Voters
87,893
Active Voters
82,350 (93.7%)

Party Registration

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

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2025–20269,531 (10.8%)<10 (—)358 (0.4%)
2023–202450,534 (57.5%)14,157 (16.1%)2,957 (3.4%)
2021–202236,183 (41.2%)12,946 (14.7%)3,989 (4.5%)
2019–202053,073 (60.4%)22,141 (25.2%)1,801 (2.0%)
2017–201840,068 (45.6%)18,452 (21.0%)2,990 (3.4%)
2015–201646,713 (53.1%)25,760 (29.3%)5,783 (6.6%)
2013–201430,919 (35.2%)6,956 (7.9%)2,826 (3.2%)
2011–201239,713 (45.2%)9,637 (11.0%)3,280 (3.7%)

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
107,088 (± 3,542)
Median Age
41.3
Median Household Income
$75,990 (± $3,292)
High School Graduate or Higher (age 25+)
90.5%
Bachelor's Degree or Higher (age 25+)
31.4%

Population by Age

GroupPeopleShare
Under 1825,17823.5%
18 to 6459,91255.9%
65 and over21,99820.5%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)11,12110.4%
White, not Hispanic37,31734.8%
Black, not Hispanic53,02749.5%
Asian, not Hispanic2,8412.7%
American Indian / Alaska Native, not Hispanic1290.1%
Native Hawaiian / Pacific Islander, not Hispanic990.1%
Some other race, not Hispanic1620.2%
Two or more races, not Hispanic2,3922.2%

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
102,530
Citizen Voting Age Population (CVAP)
78,050

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic92,82790.5%
Hispanic9,7059.5%
White35,71734.8%
Black52,89851.6%
Asian2,3922.3%
American Indian / Alaska Native1290.1%
Native Hawaiian / Pacific Islander970.1%
Two or More Races1560.2%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic73,03993.6%
Hispanic5,0086.4%
White29,46537.8%
Black41,15652.7%
Asian1,8722.4%
American Indian / Alaska Native7380.9%
Native Hawaiian / Pacific Islander290.0%
Two or More Races1480.2%

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