Ohio State Senate District 1

State Legislative District Profile (Upper Chamber)

Overview

District ID
oh-sd-001
State
Ohio
Chamber
Upper chamber (state senate)
District Code
001
Land Area
4,180.8 sq mi
Water Area
26.7 sq mi

Boundary

Boundary of Ohio State Senate District 1

Boundary as GeoJSON

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

Counties

CountyOverlapShare of district landShare of county land
Hancock County531.32 sq mi12.7%100.0%
Putnam County482.54 sq mi11.5%100.0%
Hardin County470.29 sq mi11.2%100.0%
Williams County420.66 sq mi10.1%100.0%
Paulding County416.43 sq mi10.0%100.0%
Henry County416.01 sq mi10.0%100.0%
Defiance County411.45 sq mi9.8%100.0%
Van Wert County409.15 sq mi9.8%100.0%
Fulton County405.45 sq mi9.7%100.0%
Logan County217.48 sq mi5.2%47.4%

Showing all 10 counties

Places

PlaceOverlapShare of district landShare of place land
Findlay city19.64 sq mi0.5%99.9%
Defiance city12.67 sq mi0.3%98.4%
Van Wert city7.51 sq mi0.2%99.7%
Napoleon city6.21 sq mi0.1%100.0%
Bryan city5.40 sq mi0.1%100.0%
Wauseon city5.32 sq mi0.1%100.0%
Kenton city5.00 sq mi0.1%100.0%
Archbold village4.93 sq mi0.1%99.8%
Ottawa village4.55 sq mi0.1%100.0%
Leipsic village3.68 sq mi0.1%100.0%
Delta village3.05 sq mi0.1%76.2%
Montpelier village2.90 sq mi0.1%100.0%
Holiday City village2.56 sq mi0.1%100.0%
Hicksville village2.55 sq mi0.1%99.8%
Paulding village2.36 sq mi0.1%98.6%
Swanton village2.31 sq mi0.1%68.0%
Deshler village2.29 sq mi0.1%99.9%
Ada village2.13 sq mi0.1%100.0%
Pioneer village1.79 sq mi<0.1%87.7%
Edgerton village1.72 sq mi<0.1%100.0%
Kalida village1.68 sq mi<0.1%100.0%
Glandorf village1.64 sq mi<0.1%94.2%
Fostoria city1.60 sq mi<0.1%21.1%
Sherwood village1.56 sq mi<0.1%100.0%
West Unity village1.53 sq mi<0.1%99.6%

Showing top 25 of 106 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 5184,77052.8%23.5%53.9%
OH District 9118,10133.7%15.0%29.6%
OH District 447,13813.5%6.0%16.5%

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

Voters

Registered Voters
231,553
Active Voters
204,875 (88.5%)

Party Registration

PartyVotersShare
Democratic11,6875.0%
Republican68,36829.5%
Unaffiliated00.0%
Other parties00.0%
No party recorded151,49865.4%

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2025–202656,384 (24.4%)<10 (—)6,773 (2.9%)
2023–2024181,704 (78.5%)8,464 (3.7%)52,830 (22.8%)
2021–2022127,454 (55.0%)9,217 (4.0%)50,014 (21.6%)
2019–2020167,607 (72.4%)13,730 (5.9%)40,956 (17.7%)
2017–2018119,658 (51.7%)8,422 (3.6%)32,922 (14.2%)
2015–2016144,674 (62.5%)17,170 (7.4%)69,961 (30.2%)
2013–201483,540 (36.1%)7,607 (3.3%)26,678 (11.5%)
2011–2012125,838 (54.3%)8,665 (3.7%)45,017 (19.4%)

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
347,534 (± 634)
Median Age
40.7
Median Household Income
$70,836 (± $1,404)
High School Graduate or Higher (age 25+)
93.7%
Bachelor's Degree or Higher (age 25+)
21.5%

Population by Age

GroupPeopleShare
Under 1879,09722.8%
18 to 64201,09157.9%
65 and over67,34619.4%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)22,8336.6%
White, not Hispanic309,00488.9%
Black, not Hispanic3,3991.0%
Asian, not Hispanic2,4430.7%
American Indian / Alaska Native, not Hispanic2180.1%
Native Hawaiian / Pacific Islander, not Hispanic1260.0%
Some other race, not Hispanic8080.2%
Two or more races, not Hispanic8,7032.5%

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
343,978
Citizen Voting Age Population (CVAP)
265,167

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic323,05993.9%
Hispanic20,9216.1%
White311,16390.5%
Black3,4171.0%
Asian1,5890.5%
American Indian / Alaska Native2170.1%
Native Hawaiian / Pacific Islander1220.0%
Two or More Races6040.2%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic251,79595.0%
Hispanic13,3705.0%
White243,69091.9%
Black4,1081.5%
Asian1,9560.7%
American Indian / Alaska Native1,6800.6%
Native Hawaiian / Pacific Islander760.0%
Two or More Races3590.1%

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