Pennsylvania Route 370 (designated by the Pennsylvania Department of Transportation as SR 370) is an -mile (km) long state highway located in Susquehanna and Wayne counties in Pennsylvania. The western terminus is at Route 171 in East Ararat. The eastern terminus is at Route 191 in Buckingham Township near Hancock, New York. Route 370 was first designated by the Pennsylvania Department of Highways in 1928 from the intersection with then Route 70 in East Ararat to an intersection with Route 570 in the hamlet of Preston Park (in Preston Township). The route was extended to an intersection with Route 90 (now Route 191) in 1946, when the -mile (km) long Route 570 was decommissioned.