Missouri State House District 91

State Legislative District Profile (Lower Chamber)

Overview

District ID
mo-hd-091
State
Missouri
Chamber
Lower chamber
District Code
091
Land Area
9.47 sq mi
Water Area
0.01 sq mi

Boundary

Boundary of Missouri State House District 91

Boundary as GeoJSON

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

Counties

CountyOverlapShare of district landShare of county land
St. Louis County9.47 sq mi100.0%1.9%

Showing all 1 county

Places

PlaceOverlapShare of district landShare of place land
Webster Groves city5.93 sq mi62.6%100.0%
Affton CDP1.22 sq mi12.8%26.6%
Rock Hill city1.10 sq mi11.6%99.4%
Grantwood Village town0.82 sq mi8.6%100.0%
Marlborough village0.23 sq mi2.4%100.0%
Concord CDP0.19 sq mi2.0%3.5%

Showing all 6 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 119,13052.1%2.5%49.3%
MO District 217,57047.9%2.3%50.7%

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

Voters

Registered Voters
28,037
Active Voters
26,183 (93.4%)

Party Registration

PartyVotersShare
Democratic9903.5%
Republican3791.4%
Unaffiliated7432.7%
Other parties170.1%
No party recorded25,90892.4%

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2025–20265,682 (20.3%)0 (0.0%)0 (0.0%)
2023–202422,200 (79.2%)0 (0.0%)0 (0.0%)
2021–202217,548 (62.6%)0 (0.0%)0 (0.0%)
2019–202021,107 (75.3%)0 (0.0%)0 (0.0%)
2017–201817,753 (63.3%)0 (0.0%)0 (0.0%)
2015–201618,059 (64.4%)0 (0.0%)0 (0.0%)
2013–201410,114 (36.1%)0 (0.0%)0 (0.0%)
2011–201215,681 (55.9%)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 01/02/2026. These are registered voters, separate from the Census population figures. Counts under 10 are suppressed and shown as "<10".

Demographics

Total Population
36,102 (± 851)
Median Age
39.8
Median Household Income
$104,525 (± $6,358)
High School Graduate or Higher (age 25+)
97.7%
Bachelor's Degree or Higher (age 25+)
62.6%

Population by Age

GroupPeopleShare
Under 187,52620.8%
18 to 6421,59059.8%
65 and over6,98619.4%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)1,5724.4%
White, not Hispanic28,69779.5%
Black, not Hispanic2,6327.3%
Asian, not Hispanic6251.7%
American Indian / Alaska Native, not Hispanic240.1%
Native Hawaiian / Pacific Islander, not Hispanic70.0%
Some other race, not Hispanic700.2%
Two or more races, not Hispanic2,4756.9%

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
35,287
Citizen Voting Age Population (CVAP)
27,760

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic33,94696.2%
Hispanic1,3363.8%
White30,04785.2%
Black2,4076.8%
Asian5151.5%
American Indian / Alaska Native240.1%
Native Hawaiian / Pacific Islander90.0%
Two or More Races1080.3%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic27,01497.3%
Hispanic7462.7%
White24,06986.7%
Black2,1577.8%
Asian6302.3%
American Indian / Alaska Native950.3%
Native Hawaiian / Pacific Islander70.0%
Two or More Races580.2%

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