The Heritage Corridor Line (HC) is a Metra commuter rail line in Chicago, Illinois, and its suburbs. Metra does not refer to its lines by colors, but the timetable accents for the Heritage Corridor line are "Alton Maroon". (The Alton Railroad once ran trains on this route.) The name Heritage Corridor refers to the Illinois and Michigan Canal Heritage Corridor. Established in 1984, it runs parallel to the line.
Plans for a new station on the Heritage Corridor to be located in Romeoville have been announced. The station and accompanying parking would be on property of the Citgo oil refinery between Lemont and Lockport.