Cambridge (pop: 11,520) is the county seat of Guernsey County. Located at the confluence of I-70 and I-77, Cambridge is situated within the Appalachian foothills, nearly 80 miles east of Columbus. The boyhood home of Hopalong Cassidy and John Glenn, Cambridge is known for glass museums, including the National Museum of Cambridge Glass, Mosser Glass, and the Cambridge Glass Museum along with Hopalong Cassidy's and John Glenn's Museums, Salt Fork State Park & Resort, and a wonderful, quaint downtown with a typical gorgeous Ohio courthouse.