Greendell Station is one of only three stations constructed along the Lackawanna Cut-Off, the high-speed main line built by the Delaware, Lackawanna & Western Railroad between Port Morris, NJ and Slateford, PA. The station opened on December 23, 1911 under the name Greensville, one day before the Cut-Off itself entered service. It was renamed Greendell in 1916.

Passenger service at Greendell ended in 1943, and the depot slowly fell into disuse. Following the 1960 merger of the Erie Railroad and the Lackawanna Railroad, the route entered a period of decline and later became part of Conrail in 1976. Rail activity on the Cut-Off diminished rapidly afterward, and Greendell Station continued to deteriorate for decades.

In 2014, the Lackawanna Cut-Off Historical Committee was formed to preserve and restore this historic Lackawanna Railroad depot. The Committee’s goal is to establish a museum that interprets the rich history of the Lackawanna Cut-Off as well as the local heritage of Sussex County. The planned museum will feature artifacts from the Delaware, Lackawanna & Western Railroad and other railroads historically connected to the Greendell area.