List of streetcar lines on Long Island

The following streetcar lines once operated on Long Island, New York in Queens, Nassau, and Suffolk Counties. Many of these systems were owned by the Long Island Consolidated Electrical Companies, a holding company partially owned by the Long Island Rail Road, and Interborough Rapid Transit Company between March 30, 1905 and July 18, 1935.

The Babylon Railroad Company began in 1870 as a horse-drawn trolley from the South Side Railroad's Babylon Station to the Fire Island Ferry. After the Central Railroad of Long Island opened in 1873 passengers could access the horse car to the Great South Bay at the Watson House. A second line was opened from Babylon Station into Amityville in 1910.

The Cedarhurst Railway Company ran a line from Woodmere (LIRR station) to Brosewere Bay where the Rockaway Hunt Club and Rockaway Steeplechase Association were located.

The Echo Line was a trolley line that ran from Port Jefferson Harbor to Port Jefferson (LIRR station) in what was then the Hamlet of Echo, New York. It was acquired by the Suffolk Traction Company to be merged into the main trolley line to Patchogue, but collapsed along with the rest of Suffolk Traction Company.

The Freeport Railroad was based in Freeport, New York, and existed between 1913 and 1924.

In the early-20th Century, the Long Island Rail Road installed a trolley line that ran along the former CRRLI Main Line between Garden City Station and Plainedge from 1915 to 1933. A connection to Country Life Press station was established in 1927. Trolleys were replaced by MP41's and later MP54's.

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