Seneca County, Ohio
Seneca County, Ohio · ZIP 43316, 43410, 43457
- Census data · ACS 2019-2023
- 54,730 (2024 estimate)Population
- 22,099Households
- $65,020Median household income
- $136,200Median home value
- 29Towns with a page
- 20ZIP codes
Seneca County in numbersOfficial sources, refreshed yearly
| Census | Population |
|---|---|
| 2000 | 58,683 |
| 2010 | 56,745 |
| 2020 | 55,069 |
As counted at each census, within the boundaries the area had then; the current estimate is in the glance card.
Sources: Census 2000 Summary File 1: total population, county level, state 39, retrieved November 14, 2026; Census 2010 Summary File 1: total population, county level, state 39, retrieved November 14, 2026; Census 2020 Redistricting Data (P.L. 94-171): total population, county level, state 39, retrieved November 14, 2026.
Median household income $65,020 · Share of households by income, American Community Survey 5-year 2019-2023, table S1901.
Source: American Community Survey 5-year subject table S1901 (household income) 2019–2023, county level, state 39, retrieved November 14, 2026.
- Owner occupied
- 16,225 units
- Renter occupied
- 5,874 units
- Vacancy rate
- 7.8%
Occupied housing units by tenure and the share of all units vacant, American Community Survey 5-year 2019-2023, table DP04.
Source: American Community Survey 5-year data profile 2019–2023, county level, state 39, retrieved November 14, 2026.
16,258 employees in 1,053 establishments with payroll in 2023, all sectors; employers themselves are not named in the source. County Business Patterns counts are published with noise.
Source: County Business Patterns 2023: employment by sector, county level, state 39, retrieved November 14, 2026.
| Measure | Seneca County | Ohio |
|---|---|---|
| Population | 54,861 | 11,780,046 |
| Median household income | $65,020 | $69,680 |
| Median age | 40.5 | 39.6 |
| Median home value | $136,200 | $199,200 |
| Bachelor’s degree or higher | 20.7% | 30.9% |
| Foreign-born residents | 1.5% | 5.0% |
| Owner-occupied homes | 73.4% | 67.0% |
| Mean commute to work | 20.5 minutes | 23.6 minutes |
Source: American Community Survey 5-year data profile 2019–2023, county level, state 39, retrieved November 14, 2026.
Townships, towns and villages in Seneca County29 with a page · sort by any column
| Type | |||
|---|---|---|---|
| Tiffin | City | 17,729 | 7.38 sq mi |
| Fostoria | City | 13,063 | 7.57 sq mi |
| Clinton Township | Township | 4,037 | 30.5 sq mi |
| Hopewell Township | Township | 2,731 | 34.1 sq mi |
| Loudon Township | Township | 2,191 | 33.5 sq mi |
| Liberty Township | Township | 2,008 | 36.3 sq mi |
| Eden Township | Township | 1,997 | 36.3 sq mi |
| Scipio Township | Township | 1,695 | 37.0 sq mi |
| Big Spring Township | Township | 1,677 | 36.4 sq mi |
| Venice Township | Township | 1,650 | 39.6 sq mi |
| Bloom Township | Township | 1,626 | 36.4 sq mi |
| Pleasant Township | Township | 1,487 | 35.5 sq mi |
| Seneca Township | Township | 1,436 | 35.6 sq mi |
| Jackson Township | Township | 1,411 | 34.7 sq mi |
| Thompson Township | Township | 1,382 | 37.3 sq mi |
| Adams Township | Township | 1,219 | 35.9 sq mi |
| Attica | Village | 870 | 0.67 sq mi |
| Bloomville | Village | 854 | 0.60 sq mi |
| Reed Township | Township | 710 | 38.6 sq mi |
| Bettsville | Village | 586 | 0.52 sq mi |
| Republic | Village | 544 | 0.86 sq mi |
| McCutchenville | Census designated place | 410 | 2.78 sq mi |
| Flat Rock | Census designated place | 337 | 0.21 sq mi |
| New Riegel | Village | 280 | 0.20 sq mi |
| Bascom | Census designated place | 267 | 1.51 sq mi |
| Kansas | Census designated place | 175 | 0.44 sq mi |
| Old Fort | Census designated place | 131 | 0.58 sq mi |
| Melmore | Census designated place | 99 | 0.60 sq mi |
| Fort Seneca | Census designated place | 89 | 0.63 sq mi |
Populations: Census Population Estimates, Vintage 2024: subcounty totals, state 39 (2024). Land areas: Census Gazetteer 2025: counties. A dash means the figure is not in the cited file.
County officialsFrom public records
No county official is published yet. Names appear once a researcher drafts them from the county’s own site and a second person approves; office contacts only, never personal details.
Across Seneca County
No job is posted in Seneca County’s towns yet. Employers post from their business dashboard; public job banks are added once their terms are recorded.
No upcoming event is listed in Seneca County's towns yet. Members and businesses add events from any town page.
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Neighboring counties
Neighboring counties
- Crawford CountyPopulation 41,626 (2024 estimate)
- Hancock CountyPopulation 75,016 (2024 estimate)
- Huron CountyPopulation 58,168 (2024 estimate)
- Sandusky CountyPopulation 58,866 (2024 estimate)
- Wood CountyPopulation 133,077 (2024 estimate)
- Wyandot CountyPopulation 21,394 (2024 estimate)
Sources: Census county adjacency file 2024, retrieved November 14, 2026; Census Population Estimates, Vintage 2024: subcounty totals, state 39, retrieved November 14, 2026.