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Seneca County, OH

13 cities and towns and 14 ZIP codes in Seneca County, Ohio.

Population

54,770

Land area

551sq mi

People per sq mi

99

ZIP codes

14

Cities and towns in Seneca County

Full map

Seneca County at a glance

  • Seneca County is 66% less dense than Ohio as a whole.
  • The median household income is $66,025, 8% below the Ohio median of $71,389.
  • A typical owner-occupied home is valued at $154,700 (28% below Ohio) and median rent is $856 a month.
  • Its largest cities are Tiffin (17,818), Fostoria (12,344) and Attica (755).

Local data for Seneca County, OH

Counts from official public data

Housing and community stats

Seneca County, OH, American Community Survey 2020-2024

Full profile

Median household income

$66,025

Poverty rate

11.9%

Median home value

$154,700

Prices +3.8% in a year

Median rent

$856/mo

Homeownership

73.4%

Bachelor's or higher

20.6%

Median age

40.2

Average commute

20.7 min

Largest reported origins and ancestries: German Americans (21,154), Irish Americans (5,897), Mexican Americans (2,396).

Home values and rentsIncome, education and commute

Economy and federal money

Jobs, income, federal spending and pandemic loans

Details

Unemployment rate

3.5%

Sep 2026, -0.7 pts in a year

Average annual pay

$51,007

18,700 jobs, 2025

Income per person

$52,061

BEA, 2024

Federal spending

$413M

FY 2026, $7,503 per person

PPP loans

$163M

2,294 loans, 17,694 jobs reported

Campaign donations

$194K

Itemized, 2026 cycle

EconomyFederal spendingPPP loans

How people get to work

Seneca County, OH, workers 16 and older. American Community Survey 5-year estimates

  • Drove alone81.6%
  • Carpooled7.4%
  • Public transit0.2%
  • Walked4.0%
  • Bicycle0.1%
  • Taxi, ride-hailing, motorcycle or other0.7%
  • Worked from home5.9%

Average one-way commute: 20.7 minutes for people who do not work from home.

Environment and hazard risk

Seneca County, OH, from FEMA, NOAA and EPA

Full report

Natural hazard risk

Relatively Low

Top: hail

Storm events since 1996

464

Most often thunderstorm wind

Flood insurance policies

65

0.3% of homes, county

July high / Jan low

84° / 19°F

38.7 inches of rain a year

Hazards, floods and storm historyCheck a flood zone36 historic places

Health statistics

Share of adults in Seneca County, OH, CDC PLACES estimates

All 40 measures

Obesity

35.8%

U.S. 33.3% +2.5 pts

Diabetes

13.2%

U.S. 12.1% +1.1 pts

Smoking

16.4%

U.S. 12.8% +3.6 pts

Uninsured (18-64)

8.2%

U.S. 11.1% -2.9 pts

Cities, towns and ZIP codes in Seneca County

Population shown

·

Frequently asked questions

What is the largest city in Seneca County, OH?
Tiffin is the largest city or town in Seneca County, with about 17,818 residents.
How many ZIP codes are in Seneca County?
Seneca County includes 14 ZIP Code Tabulation Areas, including 44802, 44807, 44809, 44811, 44815.
What is the population of Seneca County, OH?
About 54,770 people live in Seneca County, based on American Community Survey 5-year estimates.
What counties border Seneca County?
Seneca County borders Wood County, Hancock County, Sandusky County, Huron County, Crawford County, Wyandot County.

Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023

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