The Orange Line of Washington Metro, the Penn Line of MARC and the Northeast Regional of Amtrak serve New Carrollton's train station. The Washington Metro and MARC are local train networks, while Amtrak is a national network.
New Carrollton serves as the Orange Line's eastern terminus. The Orange Line connects New Carrollton with downtown Washington D.C. and Fairfax, Virginia, the line's western terminus. The Penn Line connects New Carrollton with BWI Airport; Baltimore, Maryland, and Perryville, Maryland, the line's eastern terminus. The Northeast Regional connects New Carrollton with Boston, Massachusetts; New York, New York, and Philadelphia, Pennsylvania, to its north. This train also connects New Carrollton with Richmond and Norfolk, Virginia, to its south.