Indiana State Senate District 18

State Legislative District Profile (Upper Chamber)

Overview

District ID
in-sd-018
State
Indiana
Chamber
Upper chamber (state senate)
District Code
018
Land Area
1,630.7 sq mi
Water Area
15.4 sq mi

Boundary

Boundary of Indiana State Senate District 18

Boundary as GeoJSON

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

Counties

CountyOverlapShare of district landShare of county land
Cass County412.14 sq mi25.3%100.0%
Miami County373.84 sq mi22.9%100.0%
Fulton County368.39 sq mi22.6%100.0%
Kosciusko County274.37 sq mi16.8%51.6%
Howard County201.98 sq mi12.4%68.9%

Showing all 5 counties

Places

PlaceOverlapShare of district landShare of place land
Logansport city10.49 sq mi0.6%100.0%
Peru city5.51 sq mi0.3%100.0%
Mexico CDP5.42 sq mi0.3%98.7%
Rochester city4.57 sq mi0.3%100.0%
Grissom AFB CDP4.00 sq mi0.2%100.0%
Greentown town1.29 sq mi0.1%93.7%
Pierceton town1.25 sq mi0.1%99.9%
Converse town0.82 sq mi0.1%82.9%
Mentone town0.58 sq mi<0.1%100.0%
Galveston town0.58 sq mi<0.1%100.0%
Royal Center town0.57 sq mi<0.1%99.9%
Kewanna town0.55 sq mi<0.1%100.0%
Silver Lake town0.53 sq mi<0.1%98.6%
Akron town0.46 sq mi<0.1%100.0%
Walton town0.43 sq mi<0.1%99.9%
Bunker Hill town0.39 sq mi<0.1%99.9%
Amboy town0.34 sq mi<0.1%100.0%
Warsaw city0.27 sq mi<0.1%2.0%
Claypool town0.24 sq mi<0.1%100.0%
Denver town0.24 sq mi<0.1%100.0%
Fulton town0.19 sq mi<0.1%100.0%
Sidney town0.12 sq mi<0.1%99.0%
Macy town0.11 sq mi<0.1%99.7%
Onward town0.10 sq mi<0.1%100.0%
Burket town0.07 sq mi<0.1%100.0%

Showing all 25 places

Overlapping Congressional Districts

Congressional districtPopulation in bothShare of this district's populationShare of the congressional district's populationShare of this district's land
IN District 288,58166.4%11.7%74.7%
IN District 425,63119.2%3.4%10.7%
IN District 516,09312.1%2.1%12.4%
IN District 33,0392.3%0.4%2.2%

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

Voters

Registered Voters
85,159
Active Voters
85,159 (100.0%)

Party Registration

This state's voter file does not record party registration.

Browse the voter list for this district (premium access; sign-in required)

Source: Civitech voter file snapshot as of 12/24/2025. These are registered voters, separate from the Census population figures. Counts under 10 are suppressed and shown as "<10".

Demographics

Total Population
132,262 (± 1,052)
Median Age
41.7
Median Household Income
$66,645 (± $1,811)
High School Graduate or Higher (age 25+)
88.9%
Bachelor's Degree or Higher (age 25+)
18.4%

Population by Age

GroupPeopleShare
Under 1829,77122.5%
18 to 6477,32058.5%
65 and over25,17119.0%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)12,4329.4%
White, not Hispanic111,27784.1%
Black, not Hispanic2,0991.6%
Asian, not Hispanic8510.6%
American Indian / Alaska Native, not Hispanic1380.1%
Native Hawaiian / Pacific Islander, not Hispanic930.1%
Some other race, not Hispanic6380.5%
Two or more races, not Hispanic4,7343.6%

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
128,980
Citizen Voting Age Population (CVAP)
99,304

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic119,03192.3%
Hispanic9,9557.7%
White112,70187.4%
Black2,0211.6%
Asian4050.3%
American Indian / Alaska Native1340.1%
Native Hawaiian / Pacific Islander910.1%
Two or More Races1280.1%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic93,75494.4%
Hispanic5,5535.6%
White89,26589.9%
Black2,5652.6%
Asian4940.5%
American Indian / Alaska Native1,2251.2%
Native Hawaiian / Pacific Islander810.1%
Two or More Races1130.1%

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