Morris County is in Skylands, New Jersey. Cities Boonton Chester Dover East Hanover Lincoln Park Long Hill Montville Morristown Mount Olive Netcong Parsippany Randolph Rockaway Succasunna Washington Township / Long Valley Other destinations Great Swamp National Wildlife Refuge Thorne Park Pyramid Mountain Understand Morris County was founded in 1739. The county seat, Morristown, was used as a shelter for George Washington and his army. Get in Get around See Do Eat Drink Stay safe Go next