Riverhead is a station along the Main Line of the Long Island Rail Road. It is located on Osborne Avenue and Railroad Street in Riverhead, New York, north of NY 25 and the Suffolk County Court House.

The Ronkonkoma Branch is a rail service operated by the Long Island Rail Road (LIRR) in the U.S. state of New York. On LIRR maps and printed schedules, the "Ronkonkoma Branch" includes trains running along the railroad's Main Line from Hicksville to Ronkonkoma, and between Ronkonkoma and the Main Line's eastern terminus at Greenport. The section of the Main Line east of Ronkonkoma is not electrified and is referred to as the Greenport Branch.