Portage County is a county located in the U.S. state of Ohio. As of the 2010 census, the population was 161,419. Its county seat is Ravenna. The county was created in 1807 and organized in 1808 and is named for the portage between the Cuyahoga and Tuscarawas Rivers.Portage County is part of the Akron Metropolitan Statistical Area, which is also included in the Cleveland–Akron–Canton Combined Statistical Area.