Ottawa County, Ohio

Ottawa County: County in Ohio, United States

About

Ottawa County is a county located in the U.S. state of Ohio. As of the 2010 census, the population was 41,428 and a population density of 27 people per km². After 10 years in 2020 county had an estimated population of 40,253 inhabitants. Its county seat is Port Clinton. The county was created 185 years ago in 1840.

Ottawa County locator map
Location of Ottawa County on Ohio map.

Quick Facts about Ottawa County

Population : 40,253 (2020)
Country : United States of America
State : Ohio (United States)
Different from : Ottawa County, Ottawa County, Ottawa County
Plate code : 62
Area : 1515 km2
Water as percent of area : 56%
Land as percent of area : 44%
Named for : Odawa people
Capital : Port Clinton
Establishment : March 03, 1840
Time Zone : America/New_York
Local time : 09:47:19 (18th May 2025)
Density : 27 Pop. per km² as of 2020
Population growth : -2.92% (2010-2020)
Downtown Port Clinton from the air image
Downtown Port Clinton from the air
Downtown Port Clinton from the air image
Downtown Port Clinton from the air image

Geography

Ottawa County is located at 41°29'48"N 82°56'29"W (41.4967500, -82.9412800). It has 3 neighbors: Erie County, Lucas County and Sandusky County.

Ottawa County map

Click "full screen" full screen map icon to open full mode. View satellite images

The largest city of Ottawa County is Port Clinton with a population of 6,133. Other cities include, Oak Harbor population 2,692 and Rocky Ridge population 407. See all Ottawa County cities & populated places.

Ottawa County Populated Places

Cities, towns, neighborhoods & other populated places in Ottawa County.

City Name Population Title
Port Clinton 6,133 City in Ohio, United States
Danbury 5,041 Township in Ottawa County, Ohio
Catawba Island 3,504 Township in Ottawa County, Ohio
Oak Harbor 2,692 Human settlement in Ottawa County, Ohio, United States of America
Genoa 2,262 Village in Ohio, United States
Elmore 1,401 Town in Alabama, United States
Marblehead 861 Village in Ottawa County, Ohio
Rocky Ridge 407 Human settlement in Ottawa County, Ohio, United States of America
Clay Center 299 Village in Ohio
Put-in-Bay 141 Township in Ottawa County, Ohio

Ottawa County has 3 neighbours.

Demographics

According to census records, the population of Ottawa County decreased by 2.92% in 10 years.

Year Population % Change Method
2010 41,428 - census
2011 41,320 -0.26% estimation process
2012 41,242 -0.19% estimation process
2013 41,035 -0.5% estimation process
2014 40,903 -0.32% estimation process
2015 40,754 -0.37% estimation process
2016 40,488 -0.66% estimation process
2017 40,623 0.33% estimation process
2018 40,769 0.36% estimation process
2019 40,525 -0.6% estimation process
2020 40,253 -0.68% estimation process

Comitatul Ottawa, Comte d'Ottawa, Comte dOttawa, Comté d'Ottawa, Comté dOttawa, Condado de Ottawa, Condado han Ottawa, Contea di Ottawa, Hrabstwo Ottawa, Kabupaten Ottawa, Okrug Otava, Otava, Ottava, Ottawa, Ottawa Comitatus, Ottawa Kun, Ottawa Kūn, Ottawa konderria, Ottawa megye, Ottawan piirikunta, Quan Ottawa, Quận Ottawa, mqatʿt awtawa, otawa jun, ottoya ka'unti, shhrstan atawa awhayw, wo tai hua xian, Округ Отава, Отава, Оттава, اوٹاوا کاؤنٹی، اوہائیو, شهرستان اتاوا، اوهایو, مقاطعة أوتاوا, ওট্টোয়া কাউন্টি, オタワ郡, 渥太華縣

People born in Ottawa County (2)

People born in Ottawa County, including singer Crystal Bowersox, Clair Dunn, .

List

Other places with the same name (4)

Ohio Other Counties (more counties)

County Name Population Title
Franklin County 1,324,624 County in Massachusetts, United States
Cuyahoga County 1,227,883 County in Ohio, United States
Columbus 884,356 The fifteenth most populous city in the United States and the center of the Columbus metropolitan area.
Hamilton County 817,985 County in New York, United States
Summit County 538,866 County in northern Utah, United States
Montgomery County 531,610 County in Ohio, United States
Lucas County 428,294 County in Ohio, United States
Butler County 385,648 County in Ohio, United States of America
Cleveland 378,589 The second most populous city in Ohio and the center of the Cleveland metropolitan area.
Stark County 369,772 County in Ohio, United States
Lorain County 312,172 County in Ohio, United States
Cincinnati 304,548 The third most populous city in Ohio and the center of the Cincinnati metropolitan area.
Toledo 271,455 The fourth most populous city in Ohio and the center of the Toledo metropolitan area.
Warren County 238,412 County in New York, United States
Lake County 229,569 County in Ohio, United States
Mahoning County 226,075 County in Ohio, United States