Overview
- District ID
- mo-hd-121
- State
- Missouri
- Chamber
- Lower chamber
- District Code
- 121
- Land Area
- 230.4 sq mi
- Water Area
- 2.22 sq mi
Boundary
Boundary as GeoJSON
Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.
Counties
Showing all 2 counties
Places
Showing all 3 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 4 | 38,731 | 100.0% | 5.0% | 100.0% |
| MO District 8 | 0 | 0.0% | 0.0% | <0.1% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 15,724
- Active Voters
- 12,588 (80.1%)
Party Registration
| Party | Voters | Share |
|---|
| Democratic | 295 | 1.9% |
| Republican | 715 | 4.5% |
| Unaffiliated | 453 | 2.9% |
| Other parties | 28 | 0.2% |
| No party recorded | 14,233 | 90.5% |
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 853 (5.4%) | 0 (0.0%) | 0 (0.0%) |
| 2023–2024 | 8,092 (51.5%) | 0 (0.0%) | 0 (0.0%) |
| 2021–2022 | 4,252 (27.0%) | 0 (0.0%) | 0 (0.0%) |
| 2019–2020 | 6,306 (40.1%) | 0 (0.0%) | 0 (0.0%) |
| 2017–2018 | 4,362 (27.7%) | 0 (0.0%) | 0 (0.0%) |
| 2015–2016 | 4,787 (30.4%) | 0 (0.0%) | 0 (0.0%) |
| 2013–2014 | 2,375 (15.1%) | 0 (0.0%) | 0 (0.0%) |
| 2011–2012 | 3,890 (24.7%) | 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
- 39,317 (± 1,150)
- Median Age
- 25.8
- Median Household Income
- $68,570 (± $6,607)
- High School Graduate or Higher (age 25+)
- 94.7%
- Bachelor's Degree or Higher (age 25+)
- 29.7%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 8,259 | 21.0% |
| 18 to 64 | 28,079 | 71.4% |
| 65 and over | 2,979 | 7.6% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 5,733 | 14.6% |
| White, not Hispanic | 24,733 | 62.9% |
| Black, not Hispanic | 4,448 | 11.3% |
| Asian, not Hispanic | 1,099 | 2.8% |
| American Indian / Alaska Native, not Hispanic | 150 | 0.4% |
| Native Hawaiian / Pacific Islander, not Hispanic | 303 | 0.8% |
| Some other race, not Hispanic | 241 | 0.6% |
| Two or more races, not Hispanic | 2,610 | 6.6% |
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
- 38,250
- Citizen Voting Age Population (CVAP)
- 30,003
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 32,742 | 85.6% |
| Hispanic | 5,509 | 14.4% |
| White | 24,797 | 64.8% |
| Black | 4,115 | 10.8% |
| Asian | 852 | 2.2% |
| American Indian / Alaska Native | 148 | 0.4% |
| Native Hawaiian / Pacific Islander | 246 | 0.6% |
| Two or More Races | 636 | 1.7% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 25,979 | 86.6% |
| Hispanic | 4,018 | 13.4% |
| White | 19,515 | 65.0% |
| Black | 4,100 | 13.7% |
| Asian | 1,220 | 4.1% |
| American Indian / Alaska Native | 575 | 1.9% |
| Native Hawaiian / Pacific Islander | 184 | 0.6% |
| Two or More Races | 479 | 1.6% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
