Summit County is an urban county located in the state of Ohio, United States. As of the 2000 census, the population was 542,899. In 2007 the population was estimated to be 543,487 . Its county seat is Akron. It is named because the highest elevation on the Ohio and Erie Canal was located here. According to the U.S. Census Bureau, the county has a total area of 420 square miles (1,088 km²): 413 square miles (1,069 km²) land, and 7 square miles (19 km²) (1.75%) water. The largest portion of Cuyahoga Valley National Park is located in the northern part of the county.
