Summit County is an urban
county in the
U.S. state of
Ohio. As of the
2010 census, the population was 541,781 making it the fourth-most populous county in Ohio. Its
county seat 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.