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Where am ILOCATED

Seneca County, Ohio

Seneca County, Ohio, has 54,522 residents (July 2025 estimate). Its county seat is Tiffin. It uses Eastern Time and covers 551 sq mi (1,427 km²) of land.

ColumbusClevelandCincinnati
Seneca County in Ohio
TiffinFostoriaAtticaBloomville
Seneca County and its neighbors (simplified outlines). Open in OpenStreetMap ↗
Resident population, July 2025
54,522
Land area
551 sq mi (1,427 km²)
County seat or government
Tiffin
Time zone
Eastern TimeUTC-05:00 in January; UTC-04:00 in July
Median household income
$66,025 ± $3,286
Median home value
$154,700 ± $3,665
Median rent, with utilities
$856 ± $20
Homes lived in by their owners
73.4% ± 1.7 points
County type
County
Metro or micro area
Tiffin, OH micro areaCentral county
Water area
1.77 sq mi (4.58 km²)
State
Ohio
County code (FIPS)
39147
Coordinates (central point)
41.119992, -83.127547
Open this point in the location finder

These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.

Time zones in Seneca County

Time zoneLocal time and UTC offsetNext clock change
Eastern TimeAmerica/New_YorkUTC-05:00 in January; UTC-04:00 in July. Enable JavaScript for the live clock.Enable JavaScript for upcoming changes.

Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.

ZIP Code areas, largest first

  1. 4488328,102 people
  2. 4483018,671 people
  3. 4481112,690 people
  4. 4341010,220 people
  5. 433165,968 people
  6. 448362,496 people
  7. 448672,345 people
  8. 448072,244 people
  9. 448822,133 people
  10. 448181,989 people
  11. 448541,630 people
  12. 434571,411 people
All 20
  1. 448531,391 people
  2. 44802746 people
  3. 44844744 people
  4. 44815710 people
  5. 44841498 people
  6. 44828138 people
  7. 44809103 people
  8. 4486131 people

20 ZIP Code areas overlap Seneca County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.

Official county information

We don’t have a website for this county yet. The US government’s local-office directory ↗ lists its offices. A geographic lookup cannot determine eligibility, tax liability or a court obligation.

Townships in Seneca County, largest first

  1. Clinton Township4,040 people
  2. Hopewell Township2,703 people
  3. Loudon Township2,613 people
  4. Liberty Township1,937 people
  5. Venice Township1,830 people
  6. Big Spring Township1,756 people
  7. Eden Township1,702 people
  8. Scipio Township1,700 people
  9. Thompson Township1,535 people
  10. Jackson Township1,517 people
  11. Bloom Township1,408 people
  12. Adams Township1,403 people
All 15
  1. Seneca Township1,278 people
  2. Pleasant Township1,137 people
  3. Reed Township745 people

People counts are American Community Survey 2020–2024 5-year estimates. All townships in Ohio, by county

School districts in Seneca County, largest first

  1. Tiffin City School District22,198 people
  2. Fostoria City School District13,388 people
  3. Bellevue City School District13,363 people
  4. Clyde-Green Springs Exempted Village School District12,176 people
  5. Lakota Local School District (Sandusky County)6,334 people
  6. Mohawk Local School District5,264 people
  7. Carey Exempted Village School District5,204 people
  8. Buckeye Central Local School District4,949 people
  9. Seneca East Local School District4,863 people
  10. Hopewell-Loudon Local School District4,780 people
  11. Old Fort Local School District2,637 people
  12. New Riegel Local School District1,800 people
All 13
  1. Vanlue Local School District1,645 people

Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.

Cities, towns and communities, largest first

These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.

  1. Tiffin, Ohio (city)17,818 people
  2. Fostoria, Ohio (city)12,344 people
  3. Green Springs, Ohio (village)1,170 people
  4. Attica, Ohio (village)755 people
  5. Bloomville, Ohio (village)721 people
  6. Bettsville, Ohio (village)562 people
  7. Republic, Ohio (village)456 people
  8. McCutchenville, Ohio (CDP)346 people
  9. Flat Rock, Ohio (CDP)340 people
  10. New Riegel, Ohio (village)316 people
  11. Bascom, Ohio (CDP)298 people
  12. Kansas, Ohio (CDP)200 people
All 15
  1. Fort Seneca, Ohio (CDP)113 people
  2. Melmore, Ohio (CDP)112 people
  3. Old Fort, Ohio (CDP)81 people

Bordering areas, nearest first

Distances are straight lines between map points.

  1. Sandusky County, Ohio16 mi north
  2. Crawford County, Ohio22 mi southeast
  3. Wyandot County, Ohio22 mi southwest
  4. Huron County, Ohio28 mi east
  5. Hancock County, Ohio29 mi west
  6. Wood County, Ohio31 mi northwest

Before using this answer on a form

Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.

Find the county where you are now, check its ZIP area, or check the time zone where you are.

See this county on Census.gov ↗

Areas that only touch the edge

These areas meet the boundary only along a sliver. Most addresses here are not in them; for an address near the line, check with the county.