Illinois State Senate District 36

State Legislative District Profile (Upper Chamber)

Overview

District ID
il-sd-036
State
Illinois
Chamber
Upper chamber (state senate)
District Code
036
Land Area
1,110.1 sq mi
Water Area
10.6 sq mi

Boundary

Boundary of Illinois State Senate District 36

Boundary as GeoJSON

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

Counties

CountyOverlapShare of district landShare of county land
Warren County359.78 sq mi32.4%66.3%
McDonough County182.75 sq mi16.5%31.0%
Knox County144.48 sq mi13.0%20.2%
Mercer County143.48 sq mi12.9%25.6%
Rock Island County143.44 sq mi12.9%33.6%
Henry County136.26 sq mi12.3%16.6%

Showing all 6 counties

Places

PlaceOverlapShare of district landShare of place land
Galesburg city17.74 sq mi1.6%99.8%
Rock Island city16.87 sq mi1.5%96.2%
Moline city16.75 sq mi1.5%100.0%
East Moline city12.05 sq mi1.1%82.6%
Macomb city8.88 sq mi0.8%83.2%
Milan village6.25 sq mi0.6%100.0%
Silvis city4.29 sq mi0.4%100.0%
Monmouth city4.24 sq mi0.4%100.0%
Colona city3.82 sq mi0.3%100.0%
Coal Valley village3.11 sq mi0.3%98.3%
Knoxville city2.35 sq mi0.2%100.0%
Bushnell city2.12 sq mi0.2%100.0%
Carbon Cliff village2.10 sq mi0.2%100.0%
Coyne Center CDP1.72 sq mi0.2%100.0%
Rock Island Arsenal CDP1.57 sq mi0.1%100.0%
Hampton village1.46 sq mi0.1%100.0%
East Galesburg village1.37 sq mi0.1%100.0%
Ophiem CDP1.18 sq mi0.1%100.0%
Cable CDP1.14 sq mi0.1%100.0%
Prairie City village1.01 sq mi0.1%100.0%
Orion village0.94 sq mi0.1%100.0%
Sherrard village0.93 sq mi0.1%100.0%
Roseville village0.74 sq mi0.1%100.0%
Oak Grove village0.66 sq mi0.1%100.0%
Cameron CDP0.63 sq mi0.1%99.9%

Showing top 25 of 40 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 17204,16193.9%27.1%60.1%
IL District 157,6103.5%1.0%28.9%
IL District 165,5442.6%0.7%11.0%

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

Voters

Registered Voters
138,140
Active Voters
128,105 (92.7%)

Party Registration

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

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2025–202630,681 (22.2%)1,473 (1.1%)<10 (—)
2023–202492,515 (67.0%)8,631 (6.2%)7,939 (5.7%)
2021–202268,331 (49.5%)12,973 (9.4%)11,808 (8.5%)
2019–202083,236 (60.3%)18,907 (13.7%)7,818 (5.7%)
2017–201862,339 (45.1%)13,153 (9.5%)9,925 (7.2%)
2015–201669,368 (50.2%)20,393 (14.8%)17,224 (12.5%)
2013–201446,674 (33.8%)6,156 (4.5%)9,224 (6.7%)
2011–201259,201 (42.9%)8,366 (6.1%)9,417 (6.8%)

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
214,332 (± 769)
Median Age
39.6
Median Household Income
$63,133 (± $1,618)
High School Graduate or Higher (age 25+)
90.1%
Bachelor's Degree or Higher (age 25+)
24.4%

Population by Age

GroupPeopleShare
Under 1845,75021.3%
18 to 64125,40358.5%
65 and over43,17920.1%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)25,67712.0%
White, not Hispanic151,72470.8%
Black, not Hispanic21,2729.9%
Asian, not Hispanic5,1962.4%
American Indian / Alaska Native, not Hispanic1450.1%
Native Hawaiian / Pacific Islander, not Hispanic970.0%
Some other race, not Hispanic8970.4%
Two or more races, not Hispanic9,3244.4%

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
205,674
Citizen Voting Age Population (CVAP)
160,852

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic183,57089.3%
Hispanic22,10610.7%
White153,76174.8%
Black19,7709.6%
Asian2,8681.4%
American Indian / Alaska Native1440.1%
Native Hawaiian / Pacific Islander970.0%
Two or More Races4120.2%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic146,96191.4%
Hispanic13,8918.6%
White127,69679.4%
Black15,6049.7%
Asian2,2741.4%
American Indian / Alaska Native1,2690.8%
Native Hawaiian / Pacific Islander980.1%
Two or More Races2590.2%

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