Mountain Station is a New Jersey Transit station in South Orange, Essex County, New Jersey, United States, along the Morris and Essex (formerly Erie Lackawanna Morristown Line). The station, built in 1915, was designed by Frank J. Nies. It has been listed in the New Jersey Register of Historic Places and National Register of Historic Places since 1984 and is part of the Operating Passenger Railroad Stations Thematic Resource.

The station is somewhat unusual in that when the Lackawanna Railroad rebuilt the Morristown Line during the 1910s and 1920s, to eliminate grade crossings between Newark and Millburn, Mountain Station was the only location at which the elevation of the railroad's roadbed was not changed. As a result, the grade crossing of Montrose Avenue at the eastbound end of the station was eliminated and the roadway was raised onto a bridge. At the westbound end of the station, the Mountain House Road crossing was eliminated entirely and a pedestrian walkway was built. The walkway was removed during the late 1970s as part of the re-electrification project for the line, however, access to Montrose Avenue is still available due to stairs on the platform.

At present, as in the past, most trains that stop here proceed onto, or have originated in, Hoboken. Most Midtown Direct trains into New York City bypass Mountain Station, but a large number do stop at the main station in South Orange, which is less than a mile to the south (timetable west). Midtown Direct trains can be accessed from Mountain Station by transferring at an intermediate station. In addition, the 92 NJT Bus is available on Scotland Road, which goes to either South Orange Station or towards Branch Brook Park Light Rail Station.

• List of New Jersey Transit stations
• Operating Passenger Railroad Stations Thematic Resource (New Jersey)
• National Register of Historic Places listings in Essex County, New Jersey

• Taber, Thomas Townsend; Taber, Thomas Townsend III (1980). The Delaware, Lackawanna & Western Railroad in the Twentieth Century. Vol. 1. Muncy, PA: Privately printed. ISBN 0-9603398-2-5.
• Taber, Thomas Townsend; Taber, Thomas Townsend III (1981). The Delaware, Lackawanna & Western Railroad in the Twentieth Century. Vol. 2. Muncy, PA: Privately printed. ISBN 0-9603398-3-3.

• Media related to Mountain Station (NJT station) at Wikimedia Commons

• Montrose Avenue entrance from Google Maps Street View