Missouri State House District 102

State Legislative District Profile (Lower Chamber)

Overview

District ID
mo-hd-102
State
Missouri
Chamber
Lower chamber
District Code
102
Land Area
196 sq mi
Water Area
5.24 sq mi

Boundary

Boundary of Missouri State House District 102

Boundary as GeoJSON

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

Counties

CountyOverlapShare of district landShare of county land
St. Charles County196.13 sq mi100.0%35.0%

Showing all 1 county

Places

PlaceOverlapShare of district landShare of place land
Weldon Spring city4.00 sq mi2.0%52.4%
Cottleville city2.35 sq mi1.2%49.5%
St. Peters city1.92 sq mi1.0%8.5%
New Melle city1.68 sq mi0.9%99.5%
Defiance CDP1.01 sq mi0.5%100.0%
Augusta town0.88 sq mi0.4%99.0%
O'Fallon city0.32 sq mi0.2%1.0%
Foristell city0.22 sq mi0.1%3.7%
Weldon Spring Heights town0.10 sq mi<0.1%100.0%

Showing all 9 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 321,21557.5%2.8%6.0%
MO District 215,65242.5%2.0%94.0%

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

Voters

Registered Voters
29,618
Active Voters
28,253 (95.4%)

Party Registration

PartyVotersShare
Democratic5421.8%
Republican1,1673.9%
Unaffiliated8142.7%
Other parties270.1%
No party recorded27,06891.4%

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2025–20265,698 (19.2%)0 (0.0%)0 (0.0%)
2023–202423,894 (80.7%)0 (0.0%)0 (0.0%)
2021–202216,558 (55.9%)0 (0.0%)0 (0.0%)
2019–202022,026 (74.4%)0 (0.0%)0 (0.0%)
2017–201817,674 (59.7%)0 (0.0%)0 (0.0%)
2015–201619,208 (64.9%)0 (0.0%)0 (0.0%)
2013–201410,181 (34.4%)0 (0.0%)0 (0.0%)
2011–201216,865 (56.9%)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
37,165 (± 1,656)
Median Age
41.7
Median Household Income
$115,132 (± $7,238)
High School Graduate or Higher (age 25+)
96.7%
Bachelor's Degree or Higher (age 25+)
45.8%

Population by Age

GroupPeopleShare
Under 188,77123.6%
18 to 6421,20457.1%
65 and over7,19019.3%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)1,3783.7%
White, not Hispanic31,77885.5%
Black, not Hispanic1,6894.5%
Asian, not Hispanic4731.3%
American Indian / Alaska Native, not Hispanic110.0%
Native Hawaiian / Pacific Islander, not Hispanic00.0%
Some other race, not Hispanic1420.4%
Two or more races, not Hispanic1,6944.6%

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
36,716
Citizen Voting Age Population (CVAP)
28,108

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic35,38396.4%
Hispanic1,3313.6%
White32,51788.6%
Black1,4814.0%
Asian3651.0%
American Indian / Alaska Native120.0%
Native Hawaiian / Pacific Islander10.0%
Two or More Races510.1%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic27,32097.2%
Hispanic7902.8%
White25,33190.1%
Black1,4365.1%
Asian3251.2%
American Indian / Alaska Native2110.8%
Native Hawaiian / Pacific Islander10.0%
Two or More Races340.1%

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