Ottawa County is a county located in the U.S. state of Ohio. As of the most recent data available, the county has a population of approximately 40,985 people, with a population density of about 160.73 persons per square mile.
The county spans a total land area of 255.00 square miles (660.00 square kilometers). The administrative center and county seat is Port Clinton, which often serves as a hub for local governance and services. The largest city within the county by population is Port Clinton.
Geographically, Ottawa County experiences varied elevations, with its highest point at Genoa 625 ft and its lowest point at Oak Harbor 585 ft. The region operates in the UTC-5.