Overview
- District ID
- mo-hd-103
- State
- Missouri
- Chamber
- Lower chamber
- District Code
- 103
- Land Area
- 11.6 sq mi
- Water Area
- 0 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 | 11.63 sq mi | 100.0% | 2.1% |
Showing all 1 county
Places
Showing all 2 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 | 18,888 | 51.0% | 2.5% | 61.3% |
| MO District 2 | 18,173 | 49.0% | 2.4% | 38.7% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 25,468
- Active Voters
- 23,991 (94.2%)
Party Registration
| Party | Voters | Share |
|---|
| Democratic | 493 | 1.9% |
| Republican | 697 | 2.7% |
| Unaffiliated | 627 | 2.5% |
| Other parties | 34 | 0.1% |
| No party recorded | 23,617 | 92.7% |
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 2,202 (8.6%) | 0 (0.0%) | 0 (0.0%) |
| 2023–2024 | 18,842 (74.0%) | 0 (0.0%) | 0 (0.0%) |
| 2021–2022 | 12,300 (48.3%) | 0 (0.0%) | 0 (0.0%) |
| 2019–2020 | 17,138 (67.3%) | 0 (0.0%) | 0 (0.0%) |
| 2017–2018 | 13,361 (52.5%) | 0 (0.0%) | 0 (0.0%) |
| 2015–2016 | 14,844 (58.3%) | 0 (0.0%) | 0 (0.0%) |
| 2013–2014 | 7,192 (28.2%) | 0 (0.0%) | 0 (0.0%) |
| 2011–2012 | 12,597 (49.5%) | 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
- 35,382 (± 1,822)
- Median Age
- 40.6
- Median Household Income
- $98,428 (± $9,748)
- High School Graduate or Higher (age 25+)
- 93.1%
- Bachelor's Degree or Higher (age 25+)
- 32.9%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 7,725 | 21.8% |
| 18 to 64 | 22,183 | 62.7% |
| 65 and over | 5,474 | 15.5% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 2,019 | 5.7% |
| White, not Hispanic | 28,516 | 80.6% |
| Black, not Hispanic | 2,305 | 6.5% |
| Asian, not Hispanic | 1,058 | 3.0% |
| American Indian / Alaska Native, not Hispanic | 6 | 0.0% |
| Native Hawaiian / Pacific Islander, not Hispanic | 0 | 0.0% |
| Some other race, not Hispanic | 154 | 0.4% |
| Two or more races, not Hispanic | 1,324 | 3.7% |
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
- 34,793
- Citizen Voting Age Population (CVAP)
- 27,148
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 32,999 | 94.8% |
| Hispanic | 1,795 | 5.2% |
| White | 28,842 | 82.9% |
| Black | 2,305 | 6.6% |
| Asian | 846 | 2.4% |
| American Indian / Alaska Native | 8 | 0.0% |
| Native Hawaiian / Pacific Islander | 2 | 0.0% |
| Two or More Races | 119 | 0.3% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 26,161 | 96.4% |
| Hispanic | 987 | 3.6% |
| White | 23,321 | 85.9% |
| Black | 1,920 | 7.1% |
| Asian | 702 | 2.6% |
| American Indian / Alaska Native | 178 | 0.7% |
| Native Hawaiian / Pacific Islander | 0 | 0.0% |
| Two or More Races | 50 | 0.2% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
