Medina County is a county in the U.S. state of Ohio. As of the 2020 census, the population was 182,470. Its county seat is Medina, and its largest city is Brunswick. The county was created in 1812 and later organized in 1818. It is named for Medina, Saudi Arabia. Medina County is part of the Cleveland, OH Metropolitan Statistical Area, although parts of the county are included in the urban area of Akron.