Pennsylvania Route 171 (PA 171, also designated by the Pennsylvania Department of Transportation as SR 0171) is a 40.17-mile-long (64.65 km) north–south state highway located in northeast Pennsylvania. The southern terminus of the route is at U.S. Route 6 Business (US 6 Bus.) in Carbondale. The northern terminus is officially at an intersection with US 11, 250 feet (76 m) to the west of Interstate 81 (I-81).