Route 73 is a state highway in the southern part of the U.S. state of New Jersey. It runs 34.64 mi (55.75 km) as an outer bypass of the Camden area from an intersection with U.S. Route 322 (US 322) in Folsom, Atlantic County, north to the Tacony–Palmyra Bridge in Palmyra, Burlington County, where the road continues into Philadelphia, Pennsylvania, as Pennsylvania Route 73. South of the interchange with the Atlantic City Expressway in Winslow Township, Camden County, Route 73 is a two-lane undivided county-maintained road and is signed as County Route 561 Spur, a spur of CR 561. North of the Atlantic City Expressway, the route is maintained by the New Jersey Department of Transportation and is mostly four lanes, with the portion north of the CR 561 concurrency a divided highway. North of the US 30 interchange near Berlin, Route 73 runs through suburban areas of the Delaware Valley metropolitan area, intersecting Route 70 in Marlton, the New Jersey Turnpike and Interstate 295 (I-295) in Mount Laurel Township, Route 38 and Route 41 in Maple Shade Township, Route 90 in Cinnaminson Township, and US 130 in Pennsauken Township.

U.S. Route 322 is a spur of U.S. Route 22, running from Cleveland, Ohio, east to Atlantic City, New Jersey. The easternmost segment of the route in New Jersey runs 62.64 miles (100.81 km) from the Commodore Barry Bridge over the Delaware River in Logan Township, Gloucester County, where it continues southeast to Atlantic Avenue and Pacific Avenue in Atlantic City, Atlantic County. The portion of the route between the Commodore Barry Bridge and Route 42 in Williamstown is mostly a two-lane undivided road that is concurrently signed with County Route 536 (CR 536), passing through Mullica Hill and Glassboro. From Williamstown, US 322 follows the Black Horse Pike, a four-lane road, southeast to Atlantic City. In Hamilton Township, Atlantic County, US 322 forms a concurrency with U.S. Route 40, continuing with that route all the way to Atlantic City. US 322 intersects several major roads including U.S. Route 130 and Interstate 295 (I-295) in Logan Township, the New Jersey Turnpike in Woolwich Township, Route 55 in Harrison Township, Route 42 in Williamstown, Route 50 and U.S. Route 40 in Hamilton Township, the Garden State Parkway in Egg Harbor Township, and U.S. Route 9 in Pleasantville.