Illinois State Senate District 26

State Legislative District Profile (Upper Chamber)

Overview

District ID
il-sd-026
State
Illinois
Chamber
Upper chamber (state senate)
District Code
026
Land Area
194.6 sq mi
Water Area
7.71 sq mi

Boundary

Boundary of Illinois State Senate District 26

Boundary as GeoJSON

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

Counties

CountyOverlapShare of district landShare of county land
Lake County116.14 sq mi59.7%26.2%
Cook County61.16 sq mi31.4%6.5%
McHenry County16.14 sq mi8.3%2.7%
Kane County1.17 sq mi0.6%0.2%

Showing all 4 counties

Places

PlaceOverlapShare of district landShare of place land
Barrington Hills village26.54 sq mi13.6%98.3%
Long Grove village12.39 sq mi6.4%100.0%
Palatine village8.97 sq mi4.6%63.5%
Hawthorn Woods village8.05 sq mi4.1%98.8%
Hoffman Estates village8.00 sq mi4.1%39.0%
South Barrington village7.39 sq mi3.8%99.1%
Lake Zurich village6.87 sq mi3.5%99.2%
Inverness village6.53 sq mi3.4%100.0%
Lake Barrington village5.74 sq mi2.9%100.0%
Mundelein village5.45 sq mi2.8%49.8%
Wauconda village5.07 sq mi2.6%100.0%
Algonquin village4.99 sq mi2.6%39.9%
North Barrington village4.71 sq mi2.4%99.7%
Barrington village4.61 sq mi2.4%99.8%
Kildeer village4.23 sq mi2.2%98.1%
Deer Park village3.65 sq mi1.9%99.6%
Libertyville village2.95 sq mi1.5%33.5%
Volo village2.21 sq mi1.1%53.7%
Fox River Grove village1.71 sq mi0.9%99.9%
Island Lake village1.49 sq mi0.8%44.3%
Tower Lakes village0.92 sq mi0.5%100.0%
Rolling Meadows city0.85 sq mi0.4%15.1%
Lakemoor village0.77 sq mi0.4%14.5%
Port Barrington village0.61 sq mi0.3%52.5%
Schaumburg village0.58 sq mi0.3%3.0%

Showing top 25 of 30 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 5104,01347.9%13.8%41.5%
IL District 956,29025.9%7.5%26.9%
IL District 1023,69310.9%3.1%11.9%
IL District 1119,3888.9%2.6%9.7%
IL District 813,7526.3%1.8%10.0%

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

Voters

Registered Voters
173,174
Active Voters
162,518 (93.8%)

Party Registration

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

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2025–202629,712 (17.2%)0 (0.0%)607 (0.4%)
2023–2024119,775 (69.2%)12,920 (7.5%)10,593 (6.1%)
2021–202290,106 (52.0%)16,573 (9.6%)16,786 (9.7%)
2019–2020115,331 (66.6%)28,045 (16.2%)11,721 (6.8%)
2017–201887,144 (50.3%)18,932 (10.9%)16,479 (9.5%)
2015–201692,209 (53.2%)22,263 (12.9%)30,686 (17.7%)
2013–201457,812 (33.4%)2,217 (1.3%)15,068 (8.7%)
2011–201271,371 (41.2%)4,745 (2.7%)16,967 (9.8%)

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
218,669 (± 2,566)
Median Age
43.1
Median Household Income
$142,354 (± $4,252)
High School Graduate or Higher (age 25+)
96.1%
Bachelor's Degree or Higher (age 25+)
58.3%

Population by Age

GroupPeopleShare
Under 1850,36123.0%
18 to 64128,02558.5%
65 and over40,28318.4%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)21,80010.0%
White, not Hispanic160,30273.3%
Black, not Hispanic3,9031.8%
Asian, not Hispanic24,25911.1%
American Indian / Alaska Native, not Hispanic670.0%
Native Hawaiian / Pacific Islander, not Hispanic230.0%
Some other race, not Hispanic7050.3%
Two or more races, not Hispanic7,6103.5%

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
206,191
Citizen Voting Age Population (CVAP)
156,972

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic187,83491.1%
Hispanic18,3558.9%
White159,31277.3%
Black3,8491.9%
Asian18,9349.2%
American Indian / Alaska Native670.0%
Native Hawaiian / Pacific Islander150.0%
Two or More Races6000.3%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic145,56492.7%
Hispanic11,4107.3%
White126,29980.5%
Black3,6892.4%
Asian14,5579.3%
American Indian / Alaska Native6490.4%
Native Hawaiian / Pacific Islander160.0%
Two or More Races3850.2%

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