Missouri State Senate District 20

State Legislative District Profile (Upper Chamber)

Overview

District ID
mo-sd-020
State
Missouri
Chamber
Upper chamber (state senate)
District Code
020
Land Area
2,257.9 sq mi
Water Area
24.1 sq mi

Boundary

Boundary of Missouri State Senate District 20

Boundary as GeoJSON

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

Counties

CountyOverlapShare of district landShare of county land
Webster County592.56 sq mi26.2%100.0%
Barton County592.03 sq mi26.2%100.0%
Greene County583.33 sq mi25.8%86.4%
Dade County490.01 sq mi21.7%100.0%

Showing all 4 counties

Places

PlaceOverlapShare of district landShare of place land
Republic city15.25 sq mi0.7%94.8%
Willard city6.04 sq mi0.3%99.9%
Marshfield city5.52 sq mi0.2%100.0%
Lamar city5.21 sq mi0.2%100.0%
Rogersville city3.70 sq mi0.2%97.5%
Mindenmines city3.65 sq mi0.2%100.0%
Seymour city3.48 sq mi0.2%100.0%
Strafford city3.27 sq mi0.1%97.7%
Fair Grove city3.19 sq mi0.1%100.0%
Battlefield city2.56 sq mi0.1%99.6%
Ash Grove city1.22 sq mi0.1%91.4%
Greenfield city1.14 sq mi0.1%100.0%
Fordland city1.11 sq mi<0.1%100.0%
Golden City city1.03 sq mi<0.1%100.0%
Dadeville village0.99 sq mi<0.1%100.0%
Lockwood city0.97 sq mi<0.1%100.0%
Diggins village0.97 sq mi<0.1%100.0%
Liberal city0.83 sq mi<0.1%98.5%
Lamar Heights city0.78 sq mi<0.1%100.0%
Walnut Grove city0.62 sq mi<0.1%99.9%
Niangua city0.41 sq mi<0.1%100.0%
Everton city0.35 sq mi<0.1%100.0%
Irwin CDP0.30 sq mi<0.1%100.0%
Iantha CDP0.27 sq mi<0.1%100.0%
Arcola village0.26 sq mi<0.1%100.0%

Showing top 25 of 28 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 7135,20976.7%17.6%36.9%
MO District 441,07223.3%5.3%63.1%

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

Voters

Registered Voters
133,114
Active Voters
125,509 (94.3%)

Party Registration

PartyVotersShare
Democratic1,3731.0%
Republican4,9693.7%
Unaffiliated2,8272.1%
Other parties1650.1%
No party recorded123,78093.0%

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2025–202613,532 (10.2%)0 (0.0%)0 (0.0%)
2023–202499,066 (74.4%)0 (0.0%)0 (0.0%)
2021–202267,107 (50.4%)0 (0.0%)0 (0.0%)
2019–202086,838 (65.2%)0 (0.0%)0 (0.0%)
2017–201869,122 (51.9%)0 (0.0%)0 (0.0%)
2015–201674,754 (56.2%)0 (0.0%)0 (0.0%)
2013–201439,335 (29.5%)0 (0.0%)0 (0.0%)
2011–201264,073 (48.1%)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
181,924 (± 1,163)
Median Age
39.1
Median Household Income
$77,489 (± $2,399)
High School Graduate or Higher (age 25+)
93.3%
Bachelor's Degree or Higher (age 25+)
30.1%

Population by Age

GroupPeopleShare
Under 1846,87525.8%
18 to 64102,75356.5%
65 and over32,29617.8%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)6,4233.5%
White, not Hispanic161,30288.7%
Black, not Hispanic1,6480.9%
Asian, not Hispanic2,5801.4%
American Indian / Alaska Native, not Hispanic4920.3%
Native Hawaiian / Pacific Islander, not Hispanic790.0%
Some other race, not Hispanic9840.5%
Two or more races, not Hispanic8,4164.6%

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
180,055
Citizen Voting Age Population (CVAP)
133,407

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic174,75797.1%
Hispanic5,2962.9%
White164,46691.3%
Black1,9931.1%
Asian2,2141.2%
American Indian / Alaska Native5030.3%
Native Hawaiian / Pacific Islander790.0%
Two or More Races4080.2%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic130,16897.6%
Hispanic3,2302.4%
White123,97892.9%
Black1,9351.5%
Asian1,8981.4%
American Indian / Alaska Native2,1701.6%
Native Hawaiian / Pacific Islander290.0%
Two or More Races1850.1%

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