Peninsula is a village in northern Summit County, Ohio, United States, along the Cuyahoga River. The population was 536 at the 2020 census. It is part of the Akron metropolitan area. Peninsula is located in the middle of the Cuyahoga Valley National Park. The Boston Mills/Brandywine Ski Resorts are located near Peninsula.

Summit County is an urban county in the U.S. state of Ohio. As of the 2020 census, the population was 540,428, making it the fourth-most populous county in Ohio. Its county seat and largest city is Akron. The county was formed on March 3, 1840, from portions of Medina, Portage and Stark Counties. It was named Summit County because the highest elevation on the Ohio and Erie Canal is located in the county.