Ottawa County, Ohio
Ottawa County is a county in Ohio with an estimated population of 39,803 in 2023. 7 cities, towns and Census places in it are indexed here.
Largest places in Ottawa County
Port Clinton 5,933Oak Harbor 2,799Genoa 2,193Elmore 1,374Marblehead 839Rocky Ridge 308Clay Center 251
About Ottawa County
Ottawa County is one of the counties of Ohio. County governments in Ohio handle local services such as courts, property records and elections; cities and towns inside the county run their own municipal services. Population figures come from the Census Bureau's Vintage 2023 estimates, which are updated annually.