---
type: Jurisdiction
title: "Seneca County, OH"
classification: county
fips: "39147"
state: "OH"
demographics:
  population: 54770
  population_under_18: 11728
  population_18_64: 32504
  population_65_plus: 10538
  median_household_income: 66025
  poverty_rate: 11.92
  homeownership_rate: 73.37
  unemployment_rate: 3.58
  median_home_value: 154700
  gini_index: 0.4239
  vacancy_rate: 7.1
  race_white: 49062
  race_black: 1358
  race_asian: 301
  race_native: 107
  hispanic: 3123
  bachelors_plus: 10459
districts:
  - to: "us/states/oh/districts/05"
    rel: in-district
    area_weight: 0.9989
  - to: "us/states/oh/districts/senate/26"
    rel: in-district
    area_weight: 1.0
  - to: "us/states/oh/districts/house/88"
    rel: in-district
    area_weight: 0.9999
sources:
  - field: demographics
    source: "Census ACS 2023"
  - field: districts
    source: "PostGIS area-intersection over Census TIGER 2024 boundaries"
confidence: official
tags: [jurisdiction, county, oh]
timestamp: "2026-07-03"
---

# Seneca County, OH

County jurisdiction — 2 officeholders mapped.

## Demographics (ACS 2023)

| Measure | Value |
| --- | --- |
| Population | 54770 |
| Under 18 | 11728 |
| 18–64 | 32504 |
| 65+ | 10538 |
| Median household income | 66025 |
| Poverty rate | 11.92 |
| Homeownership rate | 73.37 |
| Unemployment rate | 3.58 |
| Median home value | 154700 |
| Gini index | 0.4239 |
| Vacancy rate | 7.1 |
| White | 49062 |
| Black | 1358 |
| Asian | 301 |
| Native | 107 |
| Hispanic/Latino | 3123 |
| Bachelor's or higher | 10459 |

## Districts

- [OH-05](/us/states/oh/districts/05.md) — 100% (congressional)
- [OH Senate District 26](/us/states/oh/districts/senate/26.md) — 100% (state senate)
- [OH House District 88](/us/states/oh/districts/house/88.md) — 100% (state house)

## Source

- demographics: Census ACS 2023
- districts: PostGIS area-intersection over Census TIGER 2024 boundaries