Overview
- District ID
- mo-hd-115
- State
- Missouri
- Chamber
- Lower chamber
- District Code
- 115
- Land Area
- 316.9 sq mi
- Water Area
- 2.46 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 |
|---|
| Jefferson County | 316.88 sq mi | 100.0% | 48.3% |
Showing all 1 county
Places
Showing all 5 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 | 19,596 | 52.5% | 2.5% | 51.2% |
| MO District 8 | 17,730 | 47.5% | 2.3% | 48.8% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 27,349
- Active Voters
- 25,872 (94.6%)
Party Registration
| Party | Voters | Share |
|---|
| Democratic | 213 | 0.8% |
| Republican | 824 | 3.0% |
| Unaffiliated | 13,809 | 50.5% |
| Other parties | 41 | 0.1% |
| No party recorded | 12,462 | 45.6% |
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 1,564 (5.7%) | 0 (0.0%) | 0 (0.0%) |
| 2023–2024 | 19,622 (71.7%) | 0 (0.0%) | 0 (0.0%) |
| 2021–2022 | 13,673 (50.0%) | 0 (0.0%) | 0 (0.0%) |
| 2019–2020 | 18,302 (66.9%) | 0 (0.0%) | 0 (0.0%) |
| 2017–2018 | 14,026 (51.3%) | 0 (0.0%) | 0 (0.0%) |
| 2015–2016 | 15,768 (57.7%) | 0 (0.0%) | 0 (0.0%) |
| 2013–2014 | 8,506 (31.1%) | 0 (0.0%) | 0 (0.0%) |
| 2011–2012 | 13,199 (48.3%) | 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
- 38,798 (± 1,691)
- Median Age
- 41.8
- Median Household Income
- $78,867 (± $5,948)
- High School Graduate or Higher (age 25+)
- 91.2%
- Bachelor's Degree or Higher (age 25+)
- 19.4%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 8,900 | 22.9% |
| 18 to 64 | 22,307 | 57.5% |
| 65 and over | 7,591 | 19.6% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 508 | 1.3% |
| White, not Hispanic | 34,397 | 88.7% |
| Black, not Hispanic | 125 | 0.3% |
| Asian, not Hispanic | 219 | 0.6% |
| American Indian / Alaska Native, not Hispanic | 37 | 0.1% |
| Native Hawaiian / Pacific Islander, not Hispanic | 0 | 0.0% |
| Some other race, not Hispanic | 192 | 0.5% |
| Two or more races, not Hispanic | 3,320 | 8.6% |
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
- 38,743
- Citizen Voting Age Population (CVAP)
- 29,846
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 38,274 | 98.8% |
| Hispanic | 475 | 1.2% |
| White | 36,901 | 95.2% |
| Black | 139 | 0.4% |
| Asian | 202 | 0.5% |
| American Indian / Alaska Native | 37 | 0.1% |
| Native Hawaiian / Pacific Islander | 0 | 0.0% |
| Two or More Races | 86 | 0.2% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 29,570 | 99.1% |
| Hispanic | 277 | 0.9% |
| White | 28,692 | 96.1% |
| Black | 273 | 0.9% |
| Asian | 208 | 0.7% |
| American Indian / Alaska Native | 323 | 1.1% |
| Native Hawaiian / Pacific Islander | 1 | 0.0% |
| Two or More Races | 70 | 0.2% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
