Pennsylvania State Route 54 is a north -south highway in Southeastern Northumberland County, and an east-west highway across Northern Northumberland County. The southern section runs from the Columbia/Northumberland County Line, near Locustdale, to the Montour/Northumberland County Line, at Riverside. The northern sections runs from the Montour/Northumberland County Line, near Schuyler, to the Lycoming/Northumberland County Line, near Montgomery. PA St Rt 54 passes through the following town in Northumberland County. Locust Gap (SS) Strong (SS) Natalie (SS) Bear Gap (SS) Elysburg (SS) Riverside (SS)
Delaware Run (NS) PA St Rt 54 is multi-plexed in Northumberland County. Pennsylvania State Route 901, from near Merrian to Strong. (SS) Pennsylvania State Route 44, near Turbotville. (NS) Pennsylvania State Route 405, near Montgomery. (NS) PA St Rt 54 intersects the following highways in Northumberland County. Pennsylvania State Route 901, near Merrian. (SS) Pennsylvania State Route 901, at Strong. (SS) Pennsylvania State Route 61, at Strong. (SS) Pennsylvania State Route 487, at Elysburg. (SS) Pennsylvania State Route 44, near Turbotville. (NS) Interstate 180, near Turbotville. (NS) Pennsylvania State Route 405, near Montgomery. (NS)
Southern Section EB PA St Rt 54 at the Nothumberland/Montour County Line. EB PA St Rt 54 at Elysburg Road. Northern Section A guide marker on NB PA St Rt 147.
