Lorain County is a county in the northeastern part of the U.S. state of Ohio As of the 2020 census, the population was 312,964. Its county seat is Elyria, and its largest city is Lorain. The county was physically established in 1822, becoming judicially independent in 1824. Lorain County is part of the Cleveland, OH Metropolitan Statistical Area. The county is home to Oberlin College.

Huron County is a county located in the U.S. state of Ohio. As of the 2020 census, the population was 58,565. Its county seat is Norwalk. The county was created in 1809 and later organized in 1815.