The Long Beach Branch is an electrified rail line and service owned and operated by the Long Island Rail Road in the U.S. state of New York. The branch begins at Valley Interlocking, at Valley Stream station, where the Atlantic Branch continues west and the Far Rockaway Branch heads south. The Long Beach Branch runs east, paralleling the Montauk Branch, until Lynbrook, where it turns south towards Long Beach. 
The Long Beach Branch originally began as the New York and Long Beach Railroad Company from Lynbrook to Long Beach in 1880. The original southern terminus was along the Atlantic Ocean. LIRR leased and operated the NY&LB RR from 1880 to 1904, at which time the NY&LB RR merged with the LIRR. Five years later, the station was moved from the ocean front to Reynolds Channel, where it remains today.
A five mile (8 km) extension to Point Lookout, New York owned by the Long Beach Marine Railway Company existed between 1881 and 1895. When the LIRR bought the line in 1886, they continued to operate passenger trains along the line until 1890.
The northern terminus of the branch was extended westward from Lynbrook to Valley Stream in 1910 as part of its integration into the Atlantic Branch. The line was double-tracked from Valley Stream to Lynbrook in late 1910, then from East Rockaway to Wreck Lead (“WL”) on January 15, 1927. Electrification of the line occurred from Valley Stream to Long Beach on main tracks in September 1910. Electrification came to freight sidings between 1928 and 1930. Color light signals were installed in January, 1927.
On weekdays, most Long Beach Branch trains serve Penn Station, with limited service to/from Flatbush Avenue, and run express between Jamaica and Valley Stream. On weekends, trains also stop at Locust Manor, Laurelton and Rosedale, and all trains serve Penn except for some post-midnight trains to/from Flatbush Avenue and one to Jamaica.
|Miles to Penn Station||Connections/notes|
|For continuing service to Jamaica and points west, see City Terminal Zone|
|Jamaica-Beaver Street||closed 1913|
|Cedar Manor||closed January 28, 1959|
Farmers Boulevard and Bedell Street, Locust Manor
|||14||Bus (New York City Bus):Q3 (to JFK Airport); Q85|
|Higbie Avenue||closed February 2, 1960|
225th Street and 141st Road, Laurelton
|||14.9||Bus (New York City Bus): Q77, Q85|
North Conduit Avenue and 243rd Street, Rosedale
|||15.8||Bus (New York City Bus): Q5, Q85|
|Valley Stream ||||17.9||Transfer to Far Rockaway and West Hempstead Branch trains
Bus (MTA Long Island Bus): N1, N2, N3
Sunrise Highway and Peninsula Boulevard, Lynbrook
|||19.5||Transfer to Babylon Branch trains
Bus (MTA Long Island Bus): N25, N31, N32, N36
|Centre Avenue 
Forest Avenue between Rocklyn Avenue and Centre Avenue, East Rockaway
|||20.4||Originally named South Lynbrook from 1898 to 1924.|
|East Rockaway 
Ocean Avenue and Davison Place, East Rockaway
|||20.9||Bus (MTA Long Island Bus): N36|
Weidner Avenue and Lawson Boulevard, Oceanside
|Barnum Island Channel Bridge|
|Jekyl Island||Originally named Barnum Island from 1901-1903, then renamed Island Park in October 1921; closed July 1922|
|Island Park ||||23.9||Originally named The Dykes from 1898 to 1924.
Bus (MTA Long Island Bus): N15
|Reynolds Channel Bridge|
|Wreck Lead||closed December 31, 1927|
|Queenswater||closed June 1936|
|Long Beach 
Park Place and Park Avenue, Long Beach
|||24.9||Bus (MTA Long Island Bus): N15, N33
Bus (City of Long Beach): Long Beach shuttles, N69