Missouri State Senate District 3

State Legislative District Profile (Upper Chamber)

Overview

District ID
mo-sd-003
State
Missouri
Chamber
Upper chamber (state senate)
District Code
003
Land Area
2,797.1 sq mi
Water Area
17.2 sq mi

Boundary

Boundary of Missouri State Senate District 3

Boundary as GeoJSON

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

Counties

CountyOverlapShare of district landShare of county land
Washington County759.87 sq mi27.2%100.0%
Crawford County742.48 sq mi26.5%100.0%
Ste. Genevieve County499.15 sq mi17.8%100.0%
St. Francois County451.89 sq mi16.2%100.0%
Jefferson County343.80 sq mi12.3%52.4%

Showing all 5 counties

Places

PlaceOverlapShare of district landShare of place land
Park Hills city20.34 sq mi0.7%100.0%
Farmington city9.49 sq mi0.3%100.0%
Terre du Lac CDP6.99 sq mi0.2%100.0%
Ozora CDP6.13 sq mi0.2%100.0%
De Soto city4.38 sq mi0.2%100.0%
Grayhawk CDP4.35 sq mi0.2%100.0%
Bonne Terre city4.07 sq mi0.1%100.0%
Goose Creek Lake CDP3.96 sq mi0.1%100.0%
Ste. Genevieve city3.90 sq mi0.1%99.8%
Hillsboro city3.84 sq mi0.1%100.0%
Cuba city3.19 sq mi0.1%100.0%
Desloge city2.92 sq mi0.1%100.0%
Steelville city2.42 sq mi0.1%100.0%
Doe Run CDP2.41 sq mi0.1%100.0%
Sullivan city2.40 sq mi0.1%29.5%
Lake Timberline CDP2.38 sq mi0.1%100.0%
Potosi city2.33 sq mi0.1%100.0%
Iron Mountain Lake city1.96 sq mi0.1%100.0%
Raintree Plantation CDP1.95 sq mi0.1%100.0%
Bloomsdale city1.63 sq mi0.1%100.0%
Indian Lake CDP1.44 sq mi0.1%100.0%
Bourbon city1.34 sq mi<0.1%100.0%
St. Cloud village1.24 sq mi<0.1%100.0%
Leadwood city1.16 sq mi<0.1%100.0%
Weingarten CDP1.05 sq mi<0.1%100.0%

Showing top 25 of 39 places

Overlapping Congressional Districts

Congressional districtPopulation in bothShare of this district's populationShare of the congressional district's populationShare of this district's land
MO District 8105,11759.1%13.7%40.0%
MO District 372,72140.9%9.5%60.0%

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

Voters

Registered Voters
121,651
Active Voters
115,340 (94.8%)

Party Registration

PartyVotersShare
Democratic9030.7%
Republican3,2602.7%
Unaffiliated18,05914.8%
Other parties1060.1%
No party recorded99,32381.6%

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2025–202613,987 (11.5%)0 (0.0%)0 (0.0%)
2023–202483,644 (68.8%)0 (0.0%)0 (0.0%)
2021–202257,079 (46.9%)0 (0.0%)0 (0.0%)
2019–202076,945 (63.3%)0 (0.0%)0 (0.0%)
2017–201858,975 (48.5%)0 (0.0%)0 (0.0%)
2015–201665,358 (53.7%)0 (0.0%)0 (0.0%)
2013–201435,323 (29.0%)0 (0.0%)0 (0.0%)
2011–201254,705 (45.0%)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 01/02/2026. These are registered voters, separate from the Census population figures. Counts under 10 are suppressed and shown as "<10".

Demographics

Total Population
178,726 (± 1,853)
Median Age
40.8
Median Household Income
$64,012 (± $2,343)
High School Graduate or Higher (age 25+)
88.5%
Bachelor's Degree or Higher (age 25+)
16.8%

Population by Age

GroupPeopleShare
Under 1839,38822.0%
18 to 64105,85859.2%
65 and over33,48018.7%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)3,0351.7%
White, not Hispanic161,89390.6%
Black, not Hispanic2,8341.6%
Asian, not Hispanic5730.3%
American Indian / Alaska Native, not Hispanic3080.2%
Native Hawaiian / Pacific Islander, not Hispanic690.0%
Some other race, not Hispanic8480.5%
Two or more races, not Hispanic9,1665.1%

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
177,949
Citizen Voting Age Population (CVAP)
138,597

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic175,16698.4%
Hispanic2,7791.6%
White166,75493.7%
Black2,8661.6%
Asian5180.3%
American Indian / Alaska Native3100.2%
Native Hawaiian / Pacific Islander590.0%
Two or More Races4270.2%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic136,81598.7%
Hispanic1,7821.3%
White130,52994.2%
Black3,2172.3%
Asian6130.4%
American Indian / Alaska Native2,1931.6%
Native Hawaiian / Pacific Islander260.0%
Two or More Races2800.2%

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