Michigan State Senate District 20

State Legislative District Profile (Upper Chamber)

Overview

District ID
mi-sd-020
State
Michigan
Chamber
Upper chamber (state senate)
District Code
020
Land Area
1,389.2 sq mi
Water Area
501.1 sq mi

Boundary

Boundary of Michigan 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
Van Buren County573.11 sq mi41.3%94.3%
Allegan County519.81 sq mi37.4%63.0%
Berrien County224.40 sq mi16.2%39.5%
Kent County71.70 sq mi5.2%8.4%

Showing all 4 counties

Places

PlaceOverlapShare of district landShare of place land
Cutlerville CDP5.74 sq mi0.4%100.0%
Paw Paw Lake CDP5.13 sq mi0.4%100.0%
Byron Center CDP5.08 sq mi0.4%100.0%
Benton Harbor city4.38 sq mi0.3%99.8%
Fair Plain CDP4.30 sq mi0.3%100.0%
Benton Heights CDP3.86 sq mi0.3%100.0%
Allegan city3.85 sq mi0.3%100.0%
Lake Michigan Beach CDP3.83 sq mi0.3%100.0%
South Haven city3.40 sq mi0.2%98.4%
Dorr CDP3.22 sq mi0.2%100.0%
St. Joseph city3.20 sq mi0.2%100.0%
Paw Paw village2.61 sq mi0.2%97.8%
Millburg CDP1.81 sq mi0.1%100.0%
Lawrence village1.78 sq mi0.1%100.0%
Douglas city1.78 sq mi0.1%100.0%
Bangor city1.77 sq mi0.1%100.0%
Saugatuck city1.39 sq mi0.1%100.0%
Hartford city1.36 sq mi0.1%100.0%
Decatur village1.35 sq mi0.1%100.0%
Watervliet city1.18 sq mi0.1%100.0%
Bloomingdale village1.14 sq mi0.1%100.0%
Fennville city1.09 sq mi0.1%97.5%
Stevensville village1.04 sq mi0.1%100.0%
Gobles city1.03 sq mi0.1%100.0%
Coloma city0.89 sq mi0.1%100.0%

Showing top 25 of 29 places

Overlapping Congressional Districts

Congressional districtPopulation in bothShare of this district's populationShare of the congressional district's populationShare of this district's land
MI District 4183,03369.8%23.6%88.3%
MI District 355,73921.3%7.2%5.2%
MI District 523,5129.0%3.0%6.5%

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

Voters

Registered Voters
219,232
Active Voters
208,427 (95.1%)

Party Registration

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

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2025–202635,375 (16.1%)0 (0.0%)0 (0.0%)
2023–2024148,095 (67.6%)0 (0.0%)0 (0.0%)
2021–2022113,257 (51.7%)0 (0.0%)0 (0.0%)
2019–2020131,133 (59.8%)0 (0.0%)0 (0.0%)
2017–201896,882 (44.2%)0 (0.0%)0 (0.0%)
2015–2016103,932 (47.4%)0 (0.0%)0 (0.0%)
2013–201460,708 (27.7%)0 (0.0%)0 (0.0%)
2011–201292,006 (42.0%)0 (0.0%)0 (0.0%)

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 01/01/2026. These are registered voters, separate from the Census population figures. Counts under 10 are suppressed and shown as "<10".

Demographics

Total Population
264,353 (± 617)
Median Age
40.9
Median Household Income
$74,087 (± $1,929)
High School Graduate or Higher (age 25+)
90.9%
Bachelor's Degree or Higher (age 25+)
29.3%

Population by Age

GroupPeopleShare
Under 1861,89023.4%
18 to 64152,71757.8%
65 and over49,74618.8%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)24,8209.4%
White, not Hispanic196,84974.5%
Black, not Hispanic22,6688.6%
Asian, not Hispanic5,3832.0%
American Indian / Alaska Native, not Hispanic6070.2%
Native Hawaiian / Pacific Islander, not Hispanic590.0%
Some other race, not Hispanic9120.3%
Two or more races, not Hispanic13,0554.9%

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
256,411
Citizen Voting Age Population (CVAP)
195,241

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic235,49391.8%
Hispanic20,9168.2%
White200,44378.2%
Black22,2508.7%
Asian3,8801.5%
American Indian / Alaska Native6080.2%
Native Hawaiian / Pacific Islander590.0%
Two or More Races4920.2%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic184,18594.3%
Hispanic11,0565.7%
White160,97482.4%
Black17,3038.9%
Asian3,5501.8%
American Indian / Alaska Native2,3031.2%
Native Hawaiian / Pacific Islander600.0%
Two or More Races2500.1%

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