County Route 506 is a county highway in the U.S. state of New Jersey. The highway extends 10.78 miles (17.35 km) from Oak Road in Fairfield to Route 7 at the Passaic River in Belleville.

Route 7 is a state highway in the northern part of New Jersey in the United States. It has two sections, an east–west alignment running from U.S. Route 1/9 Truck in Jersey City to Route 21 in Belleville, and a north–south alignment running from the Newark/Belleville to the Nutley/Clifton border. The New Jersey Department of Transportation (NJDOT) lists Route 7 as a single north–south highway with a small gap between the alignments. The entire highway has a combined length of 9.46 mi (15.22 km).