Sandusky County is a county in the U.S. state of Ohio located southeast of the Toledo Metropolitan Area. As of the 2010 census, the population was 60,944. Its county seat is Fremont. The county was formed on February 12, 1820 from portions of Huron County. It is named for a native word meaning "water" (Wyandot: saundustee).The Fremont, OH Micropolitan Statistical Area includes all of Sandusky County.GeographyAccording to the U.S. Census Bureau, the county has a total area of, of which is land and (2.2%) is water.Adjacent countiesOttawa County (north)Erie County (east)Huron County (southeast)Seneca County (south)Wood County (west)