Mariners' Harbor is a station on the abandoned North Shore Branch of the Staten Island Railway.

It is located in an open cut in the Staten Island neighborhood of Mariners Harbor at Van Pelt Avenue, about 4.6 miles (7.4 km) from the Saint George terminal.

[1][2][3][4] The station opened in summer 1886, as Erastina as part of an extension of the North Shore Branch west to Arlington.

Buffalo Bill Cody named Erastina after Erastus Wiman,[5]: 167  who helped consolidate Staten Island's rail lines, and helped build Saint George Terminal, the North Shore Branch, and the South Beach Branch.

[7] Vacant land nearby was used for staging Buffalo Bill’s “Wild West Show”, generating over 10,000 additional passengers from the St. George Ferry Terminal over the line.