Overview
- District ID
- oh-sd-004
- State
- Ohio
- Chamber
- Upper chamber (state senate)
- District Code
- 004
- Land Area
- 388.5 sq mi
- Water Area
- 3.35 sq mi
Boundary
Boundary as GeoJSON
Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.
Counties
| County | Overlap | Share of district land | Share of county land |
|---|
| Butler County | 388.45 sq mi | 100.0% | 83.3% |
Showing all 1 county
Places
Showing all 16 places
Overlapping Congressional Districts
| Congressional district | Population in both | Share of this district's population | Share of the congressional district's population | Share of this district's land |
|---|
| OH District 8 | 368,937 | 100.0% | 46.9% | 100.0% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 231,825
- Active Voters
- 208,361 (89.9%)
Party Registration
| Party | Voters | Share |
|---|
| Democratic | 13,500 | 5.8% |
| Republican | 44,873 | 19.4% |
| Unaffiliated | 0 | 0.0% |
| Other parties | 0 | 0.0% |
| No party recorded | 173,452 | 74.8% |
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 66,865 (28.8%) | <10 (—) | 0 (0.0%) |
| 2023–2024 | 176,801 (76.3%) | 9,951 (4.3%) | 35,517 (15.3%) |
| 2021–2022 | 120,492 (52.0%) | 9,986 (4.3%) | 33,429 (14.4%) |
| 2019–2020 | 162,713 (70.2%) | 15,415 (6.6%) | 22,125 (9.5%) |
| 2017–2018 | 115,647 (49.9%) | 9,332 (4.0%) | 20,150 (8.7%) |
| 2015–2016 | 137,206 (59.2%) | 19,578 (8.4%) | 54,618 (23.6%) |
| 2013–2014 | 76,128 (32.8%) | 5,274 (2.3%) | 20,793 (9.0%) |
| 2011–2012 | 118,606 (51.2%) | 2,621 (1.1%) | 26,309 (11.3%) |
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
- 371,037 (± 198)
- Median Age
- 37.1
- Median Household Income
- $81,666 (± $1,864)
- High School Graduate or Higher (age 25+)
- 91.2%
- Bachelor's Degree or Higher (age 25+)
- 33.6%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 86,781 | 23.4% |
| 18 to 64 | 225,808 | 60.9% |
| 65 and over | 58,448 | 15.8% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 26,802 | 7.2% |
| White, not Hispanic | 272,327 | 73.4% |
| Black, not Hispanic | 32,244 | 8.7% |
| Asian, not Hispanic | 16,936 | 4.6% |
| American Indian / Alaska Native, not Hispanic | 143 | 0.0% |
| Native Hawaiian / Pacific Islander, not Hispanic | 400 | 0.1% |
| Some other race, not Hispanic | 1,781 | 0.5% |
| Two or more races, not Hispanic | 20,404 | 5.5% |
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
- 354,393
- Citizen Voting Age Population (CVAP)
- 269,705
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 334,652 | 94.4% |
| Hispanic | 19,739 | 5.6% |
| White | 275,275 | 77.7% |
| Black | 30,625 | 8.6% |
| Asian | 12,230 | 3.5% |
| American Indian / Alaska Native | 177 | 0.0% |
| Native Hawaiian / Pacific Islander | 173 | 0.0% |
| Two or More Races | 1,535 | 0.4% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 259,333 | 96.2% |
| Hispanic | 10,379 | 3.8% |
| White | 219,247 | 81.3% |
| Black | 26,995 | 10.0% |
| Asian | 10,689 | 4.0% |
| American Indian / Alaska Native | 1,688 | 0.6% |
| Native Hawaiian / Pacific Islander | 104 | 0.0% |
| Two or More Races | 845 | 0.3% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
