The Northeast Corridor Line is a commuter rail service operated by NJ Transit between the Trenton Transit Center and New York Penn Station on Amtrak's Northeast Corridor in the United States. The service is the successor to Pennsylvania Railroad commuter trains between Trenton and New York, and is NJ Transit's busiest commuter rail service. After arrival at New York Penn Station, some trains load passengers and return to New Jersey, while others continue east to Sunnyside Yard for storage. Most servicing is done at the Morrisville Yard, at the west end of the line.
As of April 27, 2025, the Northeast Corridor Line operates 131 trains (68 inbound, 63 outbound) on weekdays. Of these, 49 inbound trains originate from Trenton, 12 from Jersey Avenue, 4 from New Brunswick, 1 from Metropark, 1 from Newark Airport, and 1 from Newark Penn Station. 13 outbound trains terminate at Jersey Avenue, and 50 at Trenton. Stations north of Metropark are also served by North Jersey Coast Line trains throughout the day.