Route 170 was a short, 0.79-mile (1.27 km) state highway in Burlington County, New Jersey, United States. The route was a former alignment of U.S. Route 206 and New Jersey Route 39 in the downtown portions of Mansfield Township and Columbus. Route 170 began at an intersection with U.S. Route 206 in Mansfield Township, headed northward along Atlantic Avenue and New York Avenue in Columbus before merging with U.S. Route 206 at a wye connection further north.