Sussex

Sussex, county, extreme northern New Jersey, U.S., bordered by Pennsylvania to the northwest (the Delaware River constituting the boundary), New York state to the northeast, and Lakes Hopatcong and Musconetcong to the southeast. It consists of a hilly upland region culminating in Kittatinny Mountain in the northwest and is drained by the Wallkill, Flat Brook, and Musconetcong rivers. Among the county’s numerous lakes are Culvers Lake and Lakes Mohawk and Hopatcong, the latter the largest...