Michigan State Senate District 15

State Legislative District Profile (Upper Chamber)

Overview

District ID
mi-sd-015
State
Michigan
Chamber
Upper chamber (state senate)
District Code
015
Land Area
400.8 sq mi
Water Area
5.14 sq mi

Boundary

Boundary of Michigan State Senate District 15

Boundary as GeoJSON

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

Counties

CountyOverlapShare of district landShare of county land
Washtenaw County329.39 sq mi82.2%46.7%
Lenawee County69.07 sq mi17.2%9.2%
Monroe County2.34 sq mi0.6%0.4%

Showing all 3 counties

Places

PlaceOverlapShare of district landShare of place land
Ann Arbor city16.48 sq mi4.1%58.1%
Tecumseh city5.65 sq mi1.4%100.0%
Saline city4.34 sq mi1.1%100.0%
Ypsilanti city4.29 sq mi1.1%100.0%
Milan city3.45 sq mi0.9%99.2%
Manchester village2.13 sq mi0.5%100.0%
Clinton village1.83 sq mi0.5%100.0%

Showing all 7 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 6254,67594.2%32.8%82.8%
MI District 515,8175.8%2.0%17.2%

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

Voters

Registered Voters
219,507
Active Voters
200,239 (91.2%)

Party Registration

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

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2025–202642,565 (19.4%)0 (0.0%)0 (0.0%)
2023–2024153,110 (69.8%)0 (0.0%)0 (0.0%)
2021–2022118,690 (54.1%)0 (0.0%)0 (0.0%)
2019–2020132,698 (60.5%)0 (0.0%)0 (0.0%)
2017–201898,925 (45.1%)0 (0.0%)0 (0.0%)
2015–2016100,026 (45.6%)0 (0.0%)0 (0.0%)
2013–201462,291 (28.4%)0 (0.0%)0 (0.0%)
2011–201285,427 (38.9%)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
269,672 (± 1,685)
Median Age
33.6
Median Household Income
$80,062 (± $2,236)
High School Graduate or Higher (age 25+)
95.1%
Bachelor's Degree or Higher (age 25+)
53.1%

Population by Age

GroupPeopleShare
Under 1847,78317.7%
18 to 64181,78967.4%
65 and over40,10014.9%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)17,6556.5%
White, not Hispanic174,81864.8%
Black, not Hispanic37,76214.0%
Asian, not Hispanic22,2028.2%
American Indian / Alaska Native, not Hispanic4010.1%
Native Hawaiian / Pacific Islander, not Hispanic770.0%
Some other race, not Hispanic1,5830.6%
Two or more races, not Hispanic15,1745.6%

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
253,783
Citizen Voting Age Population (CVAP)
207,289

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic239,33294.3%
Hispanic14,4545.7%
White174,64468.8%
Black36,92214.5%
Asian15,2186.0%
American Indian / Alaska Native3940.2%
Native Hawaiian / Pacific Islander760.0%
Two or More Races1,3250.5%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic197,07595.1%
Hispanic10,2134.9%
White147,89971.3%
Black32,05015.5%
Asian14,9927.2%
American Indian / Alaska Native1,5210.7%
Native Hawaiian / Pacific Islander270.0%
Two or More Races8200.4%

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