Ottawa County
Also known as Ottawa County, Ohio, Ottawa County, OH
county in Ohio, United States
Key facts
- Country
- United States
- State
- Ohio
- Founded
- March 6, 1840
- Named after
- the Odawa tribe or a word meaning "trader"
- Seat
- Port Clinton
- Largest city
- Port Clinton
- Total
- 585 sq mi (1,520 km )
- Land
- 255 sq mi (660 km )
- Water
- 330 sq mi (850 km ) 56%
- Estimate 2025
- 39,481
- Density
- 158/sq mi (61/km )
- Time zone
- UTC−5 ( Eastern )
- Summer dst
~8 min read
Article
Ottawa County is a county located in the northwestern part of the U.S. state of Ohio. As of the 2020 census, the population was 40,364. Its county seat is Port Clinton. The county is named either for the Odawa (Ottawa) Indigenous peoples who lived there, or for an Indigenous word meaning "trader".
Ottawa County comprises the Port Clinton, OH Micropolitan Statistical Area, which is also included in the Toledo-Port Clinton, OH Combined Statistical Area.