County Route 540, abbreviated CR 540, is a county highway in the U.S. state of New Jersey. The highway extends 43.16 miles (69.46 km) from the intersection of U.S. Route 130 and Route 140 in Carneys Point Township to Harding Highway (U.S. Route 40) in Buena Vista Township. Mile markers on County Route 540 continue from NJ 140's mileage, which would indicate a short concurrency with NJ 140 to that road's western terminus at US 130, while real-world signage indicates CR 540's western terminus is at NJ 140's eastern terminus at US 40.