Pennsylvania Route 370 is a 16.73-mile-long (26.92 km) state highway located in Susquehanna and Wayne counties in Pennsylvania. The western terminus is at PA 171 in East Ararat. The eastern terminus is at PA 191 in Buckingham Township near Hancock, New York. PA 370 was first designated by the Pennsylvania Department of Highways in 1928 from the intersection with then PA 70 in East Ararat to an intersection with PA 570 in the hamlet of Preston Park. The route was extended to an intersection with PA 90 in 1946, when the 23-mile-long (37 km) PA 570 was decommissioned.

Susquehanna County is a county in the Commonwealth of Pennsylvania. As of the 2020 census, the population was 38,434 Its county seat is Montrose. The county was created on February 21, 1810, from part of Luzerne County and later organized in 1812. It is named for the Susquehanna River. The county is part of the Northeast Pennsylvania region of the state.