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Seneca County
Sign in to saveAlso known as Seneca County, Ohio, Seneca County, OH
county in Ohio, United States
Key facts
- Country
- United States
- State
- Ohio
- Founded
- April 1, 1824
- Named after
- the Seneca nation
- Seat
- Tiffin
- Largest city
- Tiffin
- Total
- 553 sq mi (1,430 km )
- Land
- 551 sq mi (1,430 km )
- Water
- 1.8 sq mi (4.7 km ) 0.3%
- Estimate 2025
- 54,522
- Density
- 100/sq mi (39/km )
- Time zone
- UTC−5 ( Eastern )
- Summer dst
- UTC−4 ( EDT )
- Congressional district
- 5th
- Website
- senecacountyohio .gov
via Wikipedia infobox
Wikidata facts
- Population
- 55069
- Area
- 1431
- Official website
- www.senecacounty.com
- Image
- Seneca County de facto courthouse.jpg
- Households
- 21759
- Licence plate code
- 74
Show 5 more facts
- Commons category
- Seneca County, Ohio
- inception
- 1820-02-12
- water as percent of area
- 0.3
- native label
- Seneca County
- per capita income
- 26810
Sources (10)
via Wikidata · CC0
~13 min read
Article
Seneca County is a county located in the northwestern part of the U.S. state of Ohio. As of the 2020 census, the population was 55,069. Its county seat is Tiffin. The county was created in 1820 and organized in 1824. It is named for the Seneca Indians, the westernmost nation of the Iroquois Confederacy. This people were based in present-day New York but had territory extending into Pennsylvania and Ohio. Seneca County comprises the Tiffin, OH Micropolitan Statistical Area, which is also included in the Findlay–Tiffin, OH Combined Statistical Area.
History