Illinois State Senate District 51

State Legislative District Profile (Upper Chamber)

Overview

District ID
il-sd-051
State
Illinois
Chamber
Upper chamber (state senate)
District Code
051
Land Area
5,118.7 sq mi
Water Area
16.9 sq mi

Boundary

Boundary of Illinois State Senate District 51

Boundary as GeoJSON

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

Counties

CountyOverlapShare of district landShare of county land
Champaign County681.47 sq mi13.3%68.4%
Vermilion County624.10 sq mi12.2%69.5%
Edgar County623.32 sq mi12.2%100.0%
Coles County508.27 sq mi9.9%100.0%
Clark County501.37 sq mi9.8%100.0%
Jasper County494.61 sq mi9.7%100.0%
Crawford County443.64 sq mi8.7%100.0%
Douglas County416.65 sq mi8.1%100.0%
Lawrence County372.18 sq mi7.3%100.0%
Cumberland County298.04 sq mi5.8%86.2%
Ford County92.38 sq mi1.8%19.0%
Effingham County51.91 sq mi1.0%10.8%
Moultrie County10.70 sq mi0.2%3.2%

Showing all 13 counties

Places

PlaceOverlapShare of district landShare of place land
Mattoon city10.31 sq mi0.2%100.0%
Mahomet village9.72 sq mi0.2%100.0%
Charleston city8.88 sq mi0.2%97.9%
Paris city5.68 sq mi0.1%99.9%
Robinson city4.70 sq mi0.1%100.0%
Hoopeston city3.69 sq mi0.1%100.0%
Marshall city3.67 sq mi0.1%100.0%
Ridge Farm village3.06 sq mi0.1%100.0%
Tuscola city2.88 sq mi0.1%97.6%
Casey city2.26 sq mi<0.1%86.3%
Lawrenceville city2.16 sq mi<0.1%100.0%
Newton city2.09 sq mi<0.1%99.9%
St. Joseph village2.03 sq mi<0.1%97.3%
Arcola city2.02 sq mi<0.1%100.0%
Martinsville city2.02 sq mi<0.1%100.0%
Tolono village1.91 sq mi<0.1%92.5%
West Union CDP1.81 sq mi<0.1%100.0%
Greenup village1.75 sq mi<0.1%100.0%
Lake of the Woods CDP1.68 sq mi<0.1%100.0%
Georgetown city1.62 sq mi<0.1%100.0%
Henning village1.52 sq mi<0.1%100.0%
Olivet CDP1.51 sq mi<0.1%100.0%
Villa Grove city1.50 sq mi<0.1%100.0%
Sumner city1.40 sq mi<0.1%100.0%
Rossville village1.40 sq mi<0.1%100.0%

Showing top 25 of 93 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 15116,33453.6%15.4%38.7%
IL District 1279,98836.8%10.6%47.5%
IL District 219,1068.8%2.5%11.7%
IL District 131,5610.7%0.2%1.8%
IL District 161800.1%<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
149,017
Active Voters
143,746 (96.5%)

Party Registration

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

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2025–202626,347 (17.7%)<10 (—)0 (0.0%)
2023–2024105,298 (70.7%)5,117 (3.4%)23,435 (15.7%)
2021–202281,870 (54.9%)5,835 (3.9%)33,485 (22.5%)
2019–202095,686 (64.2%)11,424 (7.7%)25,177 (16.9%)
2017–201871,971 (48.3%)8,219 (5.5%)26,476 (17.8%)
2015–201679,967 (53.7%)11,974 (8.0%)35,361 (23.7%)
2013–201457,318 (38.5%)4,531 (3.0%)21,506 (14.4%)
2011–201265,505 (44.0%)3,802 (2.6%)20,545 (13.8%)

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
216,541 (± 843)
Median Age
40.5
Median Household Income
$70,948 (± $1,656)
High School Graduate or Higher (age 25+)
91.7%
Bachelor's Degree or Higher (age 25+)
24.6%

Population by Age

GroupPeopleShare
Under 1849,01122.6%
18 to 64126,25458.3%
65 and over41,27619.1%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)8,1263.8%
White, not Hispanic195,37790.2%
Black, not Hispanic4,1571.9%
Asian, not Hispanic1,8350.8%
American Indian / Alaska Native, not Hispanic1580.1%
Native Hawaiian / Pacific Islander, not Hispanic130.0%
Some other race, not Hispanic4670.2%
Two or more races, not Hispanic6,4083.0%

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
214,319
Citizen Voting Age Population (CVAP)
165,569

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic207,02896.6%
Hispanic7,2863.4%
White196,28491.6%
Black4,0891.9%
Asian1,2560.6%
American Indian / Alaska Native1490.1%
Native Hawaiian / Pacific Islander140.0%
Two or More Races6030.3%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic161,08497.3%
Hispanic4,4832.7%
White153,19792.5%
Black4,1112.5%
Asian1,3410.8%
American Indian / Alaska Native2,1431.3%
Native Hawaiian / Pacific Islander130.0%
Two or More Races3340.2%

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