 Upon entering Sussex County, Route 183 enters the community of Stanhope. At the intersection with Musconetcong Avenue, the highway turns to the northwest, leaving the shores of the lake. Route 183 continues through the residential developments in Stanhope, working its way into the mountains above the lake. At the intersection with Dell Road, Route 183 becomes intertwined with the interchange on U.S. Route 206 northbound, and the highways merge a short distance later in Stanhope.
