County Route 539 (CR 539) is a county highway in the U.S. state of New Jersey. The highway extends 54.32 miles (87.42 km) from Main Street (U.S. Route 9 or US 9) in Tuckerton to CR 535 in Cranbury Township. Much of the two-lane route passes through isolated areas of the Pine Barrens and the eastern end of the Fort Dix entity of Joint Base McGuire–Dix–Lakehurst. In these stretches, the route has a speed limit of 55 miles per hour (89 km/h), one of the few two-lane roads in the state to carry a 55 mph limit. CR 539 passes through three boroughs: Tuckerton, Allentown, and Hightstown. Other than those boroughs, the route travels mainly through rural townships.