Overview
- District ID
- mo-sd-023
- State
- Missouri
- Chamber
- Upper chamber (state senate)
- District Code
- 023
- Land Area
- 216 sq mi
- Water Area
- 23.9 sq mi
Boundary
Boundary as GeoJSON
Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.
Counties
| County | Overlap | Share of district land | Share of county land |
|---|
| St. Charles County | 216.01 sq mi | 100.0% | 38.5% |
Showing all 1 county
Places
Showing all 4 places
Overlapping Congressional Districts
| Congressional district | Population in both | Share of this district's population | Share of the congressional district's population | Share of this district's land |
|---|
| MO District 3 | 179,470 | 100.0% | 23.3% | 100.0% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 127,521
- Active Voters
- 119,047 (93.4%)
Party Registration
| Party | Voters | Share |
|---|
| Democratic | 3,231 | 2.5% |
| Republican | 3,909 | 3.1% |
| Unaffiliated | 3,839 | 3.0% |
| Other parties | 139 | 0.1% |
| No party recorded | 116,403 | 91.3% |
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 18,247 (14.3%) | 0 (0.0%) | 0 (0.0%) |
| 2023–2024 | 97,681 (76.6%) | 0 (0.0%) | 0 (0.0%) |
| 2021–2022 | 66,019 (51.8%) | 0 (0.0%) | 0 (0.0%) |
| 2019–2020 | 90,094 (70.7%) | 0 (0.0%) | 0 (0.0%) |
| 2017–2018 | 71,937 (56.4%) | 0 (0.0%) | 0 (0.0%) |
| 2015–2016 | 77,429 (60.7%) | 0 (0.0%) | 0 (0.0%) |
| 2013–2014 | 39,437 (30.9%) | 0 (0.0%) | 0 (0.0%) |
| 2011–2012 | 66,583 (52.2%) | 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
- 181,378 (± 1,591)
- Median Age
- 39.7
- Median Household Income
- $92,463 (± $1,957)
- High School Graduate or Higher (age 25+)
- 95.5%
- Bachelor's Degree or Higher (age 25+)
- 41.1%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 35,712 | 19.7% |
| 18 to 64 | 112,255 | 61.9% |
| 65 and over | 33,411 | 18.4% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 8,207 | 4.5% |
| White, not Hispanic | 148,983 | 82.1% |
| Black, not Hispanic | 9,906 | 5.5% |
| Asian, not Hispanic | 5,116 | 2.8% |
| American Indian / Alaska Native, not Hispanic | 53 | 0.0% |
| Native Hawaiian / Pacific Islander, not Hispanic | 119 | 0.1% |
| Some other race, not Hispanic | 713 | 0.4% |
| Two or more races, not Hispanic | 8,281 | 4.6% |
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
- 177,268
- Citizen Voting Age Population (CVAP)
- 141,894
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 170,264 | 96.0% |
| Hispanic | 7,004 | 4.0% |
| White | 150,915 | 85.1% |
| Black | 9,810 | 5.5% |
| Asian | 3,529 | 2.0% |
| American Indian / Alaska Native | 51 | 0.0% |
| Native Hawaiian / Pacific Islander | 89 | 0.1% |
| Two or More Races | 629 | 0.4% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 137,291 | 96.8% |
| Hispanic | 4,603 | 3.2% |
| White | 123,424 | 87.0% |
| Black | 9,307 | 6.6% |
| Asian | 3,290 | 2.3% |
| American Indian / Alaska Native | 918 | 0.6% |
| Native Hawaiian / Pacific Islander | 74 | 0.1% |
| Two or More Races | 395 | 0.3% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
