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 186 years ago in 1840.
County Snapshot
Ottawa County at a glance
Ottawa County currently has 10 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.
Mapped populated places
10
These counts use a stricter populated-place filter so the main lists stay focused on real city and town pages.
Ohio counties
88
Open related pagesLargest city
Port ClintonPopulation 6,133
Top linked places
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% |
| Latitude & Longitude | 41.4968,-82.9413 |
| Named for | Odawa people |
| Capital | Port Clinton |
| Establishment | March 06, 1840 |
| Time Zone | America/New_York |
| Local time | 21:31:42 (18th April 2026) |
| Density | 27 Pop. per km² as of 2020 |
| Population growth | -2.92% (2010-2020) |
| Weather | 69℉ Chance Showers And Thunderstorms then Showers And Thunderstorms 7-days weather |
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
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The largest city of Ottawa County is Port Clinton with a population of 6,133. Other cities include, Oak Harbor population 2,692, Genoa population 2,262, Elmore population 1,401 and Marblehead population 861. 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 |
Weather
A chance of showers and thunderstorms before 8am, then showers and thunderstorms. Mostly cloudy, with a high near 69. Chance of precipitation is 80%....
7-Day ForecastOfficial website of Ottawa County
Official WebsiteDemographics
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 |
People born in Ottawa County (2)
People born in Ottawa County, including singer Crystal Bowersox, Clair Dunn, .
More notable people
Other places with the same name (3)
- Ottawa County, Michigan county in Michigan, United States with a population of 294,635 people.
- Ottawa County, Oklahoma county in Oklahoma, United States with a population of 30,879 people.
- Ottawa County, Kansas county in Kansas, United States with a population of 5,712 people.
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 |