Portland Transportation Center

Portland Transportation Center is a bus and train station in Portland, Maine, United States, served and run primarily by Concord Coach Lines (18 round-trips a day) and Amtrak Downeaster passenger trains (five round-trips a day). It is also served by Megabus (via Concord Coach Lines), as well as the Greater Portland Metro route 1 and BREEZ bus services. The station is open from 4:30 AM to 12:15 AM and from 2:45 AM to 3:15 AM.

Portland Transportation Center is located in Portland's Libbytown neighborhood, about a half mile west of the former site of Portland Union Station. It is located next to Pan Am Railways' Mountain Branch, formerly the Mountain Division of the Maine Central Railroad.

In 2019, the NNERPA Board (which governs the Downeaster service) supported a proposal to relocate the station to the mainline to avoid time-consuming backup moves. A two-year study by the Maine Department of Transportation endorsed moving Amtrak service from this station to a location near Portland's original Union Station, on St. John Street. A 2024 Amtrak study identified three potential locations: between Congress Street and Park Avenue, the Union Station site, and near Mercy Hospital south of the Mountain Branch junction.