South Farmingdale was a station along the Central Branch of the Long Island Rail Road in South Farmingdale, New York, United States.

The Central Branch is a rail line owned and operated by the Long Island Rail Road (LIRR) in the U.S. state of New York, extending from 40.734°N 73.470°W just east of Bethpage station to 40.696°N 73.341°W just west of Babylon station. It was built in 1873 as part of the Babylon Extension of the Central Railroad of Long Island (CRRLI), which was owned by Alexander Turney Stewart. The branch was mostly unused following the 1876 merger of the CRRLI and the LIRR, but in 1925 it was rebuilt and reconfigured to connect Bethpage and Babylon stations.