Sandusky is a city in and the county seat of Erie County, Ohio, United States. Situated along the southern shore of Lake Erie, Sandusky is located roughly midway between Toledo and Cleveland. According to 2020 census, the city had a population of 25,095, and the Sandusky metropolitan area had 115,986 residents.

Erie County is a county in the northern portion of the U.S. state of Ohio. As of the 2020 census, the population was 75,622. Its county seat and largest city is Sandusky. The county is named for the Erie tribe, whose name was their word for "wildcat". It was formed in 1838 from the northern third of Huron County and a portion of Sandusky County.