County Route 510 is a county highway in the U.S. state of New Jersey. The highway extends 29.58 miles (47.60 kilometers) from North Road (CR 513) in Chester to McCarter Highway (Route 21) in Newark.
A separate, westbound portion of CR 510 stretches 1.21 miles (1.95 km) through Morristown.
CR 510 intersects Interstate 287 at Exits 36A-B in Morristown. CR 510 intersects the Garden State Parkway at Exit 144 in Newark.