Kansas State Senate District 12

State Legislative District Profile (Upper Chamber)

Overview

District ID
ks-sd-012
State
Kansas
Chamber
Upper chamber (state senate)
District Code
012
Land Area
4,011.4 sq mi
Water Area
68.8 sq mi

Boundary

Boundary of Kansas State Senate District 12

Boundary as GeoJSON

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

Counties

CountyOverlapShare of district landShare of county land
Coffey County626.88 sq mi15.6%100.0%
Linn County594.08 sq mi14.8%100.0%
Anderson County579.64 sq mi14.4%100.0%
Wilson County570.42 sq mi14.2%100.0%
Allen County500.30 sq mi12.5%100.0%
Woodson County497.82 sq mi12.4%100.0%
Miami County333.18 sq mi8.3%57.9%
Franklin County309.11 sq mi7.7%54.1%

Showing all 8 counties

Places

PlaceOverlapShare of district landShare of place land
Osawatomie city5.25 sq mi0.1%100.0%
Paola city4.99 sq mi0.1%94.1%
Iola city4.47 sq mi0.1%100.0%
Piqua CDP3.97 sq mi0.1%100.0%
Garnett city3.08 sq mi0.1%100.0%
Linn Valley city2.96 sq mi0.1%100.0%
Yates Center city2.53 sq mi0.1%100.0%
Fredonia city2.44 sq mi0.1%100.0%
Burlington city2.21 sq mi0.1%98.1%
Pleasanton city2.08 sq mi0.1%96.1%
Lafontaine CDP2.00 sq mi<0.1%100.0%
Centerville CDP1.84 sq mi<0.1%100.0%
La Cygne city1.53 sq mi<0.1%100.0%
Humboldt city1.53 sq mi<0.1%100.0%
Neodesha city1.40 sq mi<0.1%100.0%
Mound City city1.16 sq mi<0.1%100.0%
Williamsburg city0.98 sq mi<0.1%100.0%
Lebo city0.96 sq mi<0.1%100.0%
Welda CDP0.93 sq mi<0.1%100.0%
Fontana city0.84 sq mi<0.1%93.0%
LeRoy city0.82 sq mi<0.1%99.9%
La Harpe city0.80 sq mi<0.1%99.9%
New Strawn city0.79 sq mi<0.1%100.0%
Waverly city0.73 sq mi<0.1%100.0%
Gas city0.72 sq mi<0.1%100.0%

Showing top 25 of 53 places

Overlapping Congressional Districts

Congressional districtPopulation in bothShare of this district's populationShare of the congressional district's populationShare of this district's land
KS District 242,21658.3%5.7%69.5%
KS District 330,19341.7%4.1%30.5%

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

Voters

Registered Voters
52,501
Active Voters
49,687 (94.6%)

Party Registration

PartyVotersShare
Democratic7,41214.1%
Republican30,76858.6%
Unaffiliated13,55425.8%
Other parties7671.5%
No party recorded00.0%

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2025–2026<10 (—)0 (0.0%)0 (0.0%)
2023–202435,986 (68.5%)0 (0.0%)0 (0.0%)
2021–202226,538 (50.5%)0 (0.0%)0 (0.0%)
2019–202033,792 (64.4%)0 (0.0%)0 (0.0%)
2017–201824,411 (46.5%)0 (0.0%)0 (0.0%)
2015–201627,228 (51.9%)0 (0.0%)0 (0.0%)
2013–201419,955 (38.0%)0 (0.0%)0 (0.0%)
2011–201223,038 (43.9%)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 11/03/2025. These are registered voters, separate from the Census population figures. Counts under 10 are suppressed and shown as "<10".

Demographics

Total Population
72,966 (± 765)
Median Age
42.8
Median Household Income
$67,253 (± $2,825)
High School Graduate or Higher (age 25+)
91.7%
Bachelor's Degree or Higher (age 25+)
21.0%

Population by Age

GroupPeopleShare
Under 1816,32622.4%
18 to 6441,12556.4%
65 and over15,51521.3%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)2,8213.9%
White, not Hispanic65,26889.4%
Black, not Hispanic1,0911.5%
Asian, not Hispanic2210.3%
American Indian / Alaska Native, not Hispanic2130.3%
Native Hawaiian / Pacific Islander, not Hispanic660.1%
Some other race, not Hispanic740.1%
Two or more races, not Hispanic3,2124.4%

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
72,339
Citizen Voting Age Population (CVAP)
56,025

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic69,81096.5%
Hispanic2,5283.5%
White65,79991.0%
Black1,0731.5%
Asian1840.3%
American Indian / Alaska Native2130.3%
Native Hawaiian / Pacific Islander670.1%
Two or More Races2600.4%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic54,36497.0%
Hispanic1,6553.0%
White51,76592.4%
Black1,1292.0%
Asian2180.4%
American Indian / Alaska Native1,0962.0%
Native Hawaiian / Pacific Islander430.1%
Two or More Races1210.2%

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