Missouri State Senate District 31

State Legislative District Profile (Upper Chamber)

Overview

District ID
mo-sd-031
State
Missouri
Chamber
Upper chamber (state senate)
District Code
031
Land Area
2,362.6 sq mi
Water Area
24.4 sq mi

Boundary

Boundary of Missouri State Senate District 31

Boundary as GeoJSON

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

Counties

CountyOverlapShare of district landShare of county land
Bates County836.70 sq mi35.4%100.0%
Johnson County829.26 sq mi35.1%100.0%
Cass County696.61 sq mi29.5%100.0%

Showing all 3 counties

Places

PlaceOverlapShare of district landShare of place land
Raymore city17.31 sq mi0.7%100.0%
Belton city14.25 sq mi0.6%98.8%
Harrisonville city9.88 sq mi0.4%88.4%
Warrensburg city9.41 sq mi0.4%100.0%
Peculiar city9.06 sq mi0.4%100.0%
Pleasant Hill city7.24 sq mi0.3%90.2%
Whiteman AFB CDP6.68 sq mi0.3%100.0%
Butler city4.07 sq mi0.2%100.0%
Knob Noster city2.88 sq mi0.1%100.0%
Drexel city2.73 sq mi0.1%100.0%
Garden City city2.47 sq mi0.1%100.0%
Holden city2.41 sq mi0.1%100.0%
Lake Winnebago city2.32 sq mi0.1%100.0%
Loch Lloyd village1.74 sq mi0.1%100.0%
Adrian city1.67 sq mi0.1%100.0%
Archie city1.49 sq mi0.1%99.1%
Cleveland city1.48 sq mi0.1%99.4%
Lee's Summit city1.41 sq mi0.1%2.2%
Rich Hill city1.37 sq mi0.1%100.0%
Kansas City city1.04 sq mi<0.1%0.3%
Freeman city0.86 sq mi<0.1%100.0%
Hume town0.66 sq mi<0.1%100.0%
Amsterdam city0.57 sq mi<0.1%100.0%
Leeton city0.52 sq mi<0.1%100.0%
Foster village0.47 sq mi<0.1%99.9%

Showing top 25 of 42 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 4177,879100.0%23.1%100.0%

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

Voters

Registered Voters
128,205
Active Voters
117,315 (91.5%)

Party Registration

PartyVotersShare
Democratic1,9981.6%
Republican5,2524.1%
Unaffiliated29,82423.3%
Other parties2280.2%
No party recorded90,90370.9%

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2025–202611,865 (9.3%)0 (0.0%)0 (0.0%)
2023–202491,459 (71.3%)0 (0.0%)0 (0.0%)
2021–202261,861 (48.3%)0 (0.0%)0 (0.0%)
2019–202082,147 (64.1%)0 (0.0%)0 (0.0%)
2017–201861,941 (48.3%)0 (0.0%)0 (0.0%)
2015–201668,046 (53.1%)0 (0.0%)0 (0.0%)
2013–201436,271 (28.3%)0 (0.0%)0 (0.0%)
2011–201259,114 (46.1%)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
181,691
Median Age
37.8
Median Household Income
$77,408 (± $1,989)
High School Graduate or Higher (age 25+)
93.5%
Bachelor's Degree or Higher (age 25+)
28.1%

Population by Age

GroupPeopleShare
Under 1841,78523.0%
18 to 64109,67160.4%
65 and over30,23516.6%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)9,3205.1%
White, not Hispanic153,31884.4%
Black, not Hispanic7,7304.3%
Asian, not Hispanic1,7371.0%
American Indian / Alaska Native, not Hispanic3220.2%
Native Hawaiian / Pacific Islander, not Hispanic3090.2%
Some other race, not Hispanic1,2280.7%
Two or more races, not Hispanic7,7274.3%

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
179,874
Citizen Voting Age Population (CVAP)
138,249

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic171,04995.1%
Hispanic8,8264.9%
White155,81086.6%
Black7,5034.2%
Asian1,1360.6%
American Indian / Alaska Native3300.2%
Native Hawaiian / Pacific Islander2180.1%
Two or More Races6210.3%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic132,69096.0%
Hispanic5,5614.0%
White122,08888.3%
Black6,9455.0%
Asian1,5431.1%
American Indian / Alaska Native1,7641.3%
Native Hawaiian / Pacific Islander990.1%
Two or More Races2800.2%

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