Ohio State Senate District 18

State Legislative District Profile (Upper Chamber)

Overview

District ID
oh-sd-018
State
Ohio
Chamber
Upper chamber (state senate)
District Code
018
Land Area
362.7 sq mi
Water Area
751.2 sq mi

Boundary

Boundary of Ohio 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
Lake County229.27 sq mi63.2%99.9%
Cuyahoga County133.26 sq mi36.7%29.1%

Showing all 2 counties

Places

PlaceOverlapShare of district landShare of place land
Mentor city27.80 sq mi7.7%100.0%
Solon city20.31 sq mi5.6%100.0%
Brecksville city19.45 sq mi5.4%100.0%
Kirtland city16.67 sq mi4.6%100.0%
Willoughby Hills city10.76 sq mi3.0%100.0%
Willoughby city10.24 sq mi2.8%100.0%
Independence city9.53 sq mi2.6%100.0%
Gates Mills village8.98 sq mi2.5%100.0%
Moreland Hills village7.16 sq mi2.0%100.0%
Pepper Pike city7.12 sq mi2.0%100.0%
Hunting Valley village6.95 sq mi1.9%88.1%
Painesville city6.83 sq mi1.9%100.0%
Walton Hills village6.75 sq mi1.9%100.0%
Eastlake city6.41 sq mi1.8%100.0%
Kirtland Hills village5.57 sq mi1.5%100.0%
Valley View village5.43 sq mi1.5%100.0%
Highland Heights city5.15 sq mi1.4%100.0%
Madison village5.09 sq mi1.4%100.0%
Seven Hills city4.90 sq mi1.4%100.0%
Wickliffe city4.61 sq mi1.3%100.0%
Richmond Heights city4.43 sq mi1.2%100.0%
Waite Hill village4.18 sq mi1.2%100.0%
Mayfield Heights city4.17 sq mi1.1%100.0%
Mayfield village3.94 sq mi1.1%100.0%
North Madison CDP3.91 sq mi1.1%100.0%

Showing top 25 of 41 places

Overlapping Congressional Districts

Congressional districtPopulation in bothShare of this district's populationShare of the congressional district's populationShare of this district's land
OH District 14232,60362.6%29.6%63.2%
OH District 1169,94018.8%8.9%15.4%
OH District 768,85118.5%8.8%21.3%

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

Voters

Registered Voters
265,011
Active Voters
237,779 (89.7%)

Party Registration

PartyVotersShare
Democratic31,33011.8%
Republican50,67119.1%
Unaffiliated00.0%
Other parties00.0%
No party recorded183,01069.1%

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2025–202685,567 (32.3%)6,667 (2.5%)5,236 (2.0%)
2023–2024213,923 (80.7%)23,072 (8.7%)38,088 (14.4%)
2021–2022157,017 (59.2%)26,642 (10.1%)41,199 (15.5%)
2019–2020203,014 (76.6%)36,241 (13.7%)24,090 (9.1%)
2017–2018151,548 (57.2%)27,285 (10.3%)27,341 (10.3%)
2015–2016172,263 (65.0%)39,067 (14.7%)60,389 (22.8%)
2013–2014104,065 (39.3%)17,327 (6.5%)19,042 (7.2%)
2011–2012155,116 (58.5%)21,647 (8.2%)32,164 (12.1%)

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 01/20/2026. These are registered voters, separate from the Census population figures. Counts under 10 are suppressed and shown as "<10".

Demographics

Total Population
369,186 (± 889)
Median Age
45.0
Median Household Income
$86,734 (± $1,389)
High School Graduate or Higher (age 25+)
94.8%
Bachelor's Degree or Higher (age 25+)
38.5%

Population by Age

GroupPeopleShare
Under 1871,83919.5%
18 to 64213,08857.7%
65 and over84,25922.8%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)17,1094.6%
White, not Hispanic293,85879.6%
Black, not Hispanic28,8677.8%
Asian, not Hispanic12,1453.3%
American Indian / Alaska Native, not Hispanic2640.1%
Native Hawaiian / Pacific Islander, not Hispanic1430.0%
Some other race, not Hispanic1,3640.4%
Two or more races, not Hispanic15,4364.2%

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
361,106
Citizen Voting Age Population (CVAP)
290,017

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic346,05095.8%
Hispanic15,0554.2%
White298,11082.6%
Black28,9408.0%
Asian8,9282.5%
American Indian / Alaska Native2620.1%
Native Hawaiian / Pacific Islander1250.0%
Two or More Races6180.2%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic280,68196.8%
Hispanic9,3373.2%
White246,63585.0%
Black24,5798.5%
Asian7,9402.7%
American Indian / Alaska Native1,0220.4%
Native Hawaiian / Pacific Islander910.0%
Two or More Races5180.2%

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