The New Jersey Southern Railroad was a railroad that started in 1854. It would continue under this name until the 1870s as a separate company and the lines that it had constructed or run continued to be run in the New Jersey Southern name until the early 2000s.
The New Jersey Southern Railroad (NJS) began life as the Raritan and Delaware Bay Railroad Company (R&DB), in March 1854. The R&DB was chartered to construct a railroad from the Raritan Bay to Cape Island (Cape May), near the outlet of the Delaware Bay. It was to form part of a rail and water route from New York to Norfolk, Virginia. The man behind it was William A Torrey, who owned 43 square miles (110 km2) in the area of present-day Lakehurst.
Construction began in 1858 from Port Monmouth on Raritan Bay. The first segment opened in June 1860 ran south via Red Bank as far as Eatontown and then by a branch running east to the resort town of Long Branch on the shore. It was the first railroad to reach Long Branch. Summer service in the first year was three train and boat trips per day in each direction. This first section included what would remain the two largest engineering works on the line: the long pier at Port Monmouth and the Navesink River bridge at Red Bank.
Later in 1860 the main line was opened as far as Lakewood. As construction continued, instead of turning southeast at Lakehurst to Toms River and parallel to the shore to Cape May, the main line continued southwest, opening to Whiting (Manchester Township) and Atsion (now in Wharton State Forest) in 1862. The route passed through the center of the lightly populated Pine Barrens, and was connected to towns on Barnegat Bay only by stages running on public roads. A branch to Toms River was opened later, in 1866, and extended to Waretown in 1872.