Missouri State Senate District 1

State Legislative District Profile (Upper Chamber)

Overview

District ID
mo-sd-001
State
Missouri
Chamber
Upper chamber (state senate)
District Code
001
Land Area
57.2 sq mi
Water Area
2.87 sq mi

Boundary

Boundary of Missouri State Senate District 1

Boundary as GeoJSON

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

Counties

CountyOverlapShare of district landShare of county land
St. Louis County57.18 sq mi100.0%11.3%

Showing all 1 county

Places

PlaceOverlapShare of district landShare of place land
Oakville CDP15.88 sq mi27.8%100.0%
Mehlville CDP7.47 sq mi13.1%99.9%
Webster Groves city5.93 sq mi10.4%100.0%
Concord CDP5.50 sq mi9.6%100.0%
Affton CDP4.57 sq mi8.0%100.0%
Lemay CDP4.10 sq mi7.2%100.0%
Crestwood city3.59 sq mi6.3%100.0%
Sappington CDP2.39 sq mi4.2%100.0%
Green Park city1.31 sq mi2.3%100.0%
Grantwood Village town0.82 sq mi1.4%100.0%
Oakland city0.60 sq mi1.1%100.0%
St. George CDP0.24 sq mi0.4%100.0%
Marlborough village0.23 sq mi0.4%100.0%
Lakeshire city0.22 sq mi0.4%99.4%
Bella Villa city0.13 sq mi0.2%100.0%
Wilbur Park village0.06 sq mi0.1%100.0%

Showing all 16 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 2170,39792.2%22.1%93.7%
MO District 114,4567.8%1.9%6.3%

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

Voters

Registered Voters
134,295
Active Voters
125,096 (93.2%)

Party Registration

PartyVotersShare
Democratic3,4832.6%
Republican2,6672.0%
Unaffiliated3,5092.6%
Other parties1110.1%
No party recorded124,52592.7%

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2025–202619,149 (14.3%)0 (0.0%)0 (0.0%)
2023–202498,953 (73.7%)0 (0.0%)0 (0.0%)
2021–202272,926 (54.3%)0 (0.0%)0 (0.0%)
2019–202093,734 (69.8%)0 (0.0%)0 (0.0%)
2017–201877,313 (57.6%)0 (0.0%)0 (0.0%)
2015–201682,077 (61.1%)0 (0.0%)0 (0.0%)
2013–201444,884 (33.4%)0 (0.0%)0 (0.0%)
2011–201271,258 (53.1%)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
181,511 (± 2,831)
Median Age
41.8
Median Household Income
$84,791 (± $2,403)
High School Graduate or Higher (age 25+)
94.1%
Bachelor's Degree or Higher (age 25+)
42.1%

Population by Age

GroupPeopleShare
Under 1836,33120.0%
18 to 64107,94759.5%
65 and over37,23320.5%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)5,5743.1%
White, not Hispanic155,78485.8%
Black, not Hispanic6,1583.4%
Asian, not Hispanic4,3712.4%
American Indian / Alaska Native, not Hispanic960.1%
Native Hawaiian / Pacific Islander, not Hispanic220.0%
Some other race, not Hispanic2270.1%
Two or more races, not Hispanic9,2795.1%

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
177,004
Citizen Voting Age Population (CVAP)
141,382

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic172,37997.4%
Hispanic4,6222.6%
White158,45889.5%
Black5,8403.3%
Asian3,3761.9%
American Indian / Alaska Native940.1%
Native Hawaiian / Pacific Islander130.0%
Two or More Races2990.2%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic138,49298.0%
Hispanic2,8982.0%
White129,08391.3%
Black4,9573.5%
Asian3,4152.4%
American Indian / Alaska Native8360.6%
Native Hawaiian / Pacific Islander130.0%
Two or More Races1900.1%

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