Locust Valley is a station on the Oyster Bay Branch of the Long Island Rail Road. It is located at Birch Hill Road and Piping Rock Road, south of Forest Avenue, in Locust Valley, Nassau County, New York.

The Locust Valley station was opened on April 19, 1869, and it served as the terminus of the line until 1889, upon the line's extension to Oyster Bay. On August 22, the turntable and engine house were moved from Glen Street and installed here. Charles Hallet finished a depot here in November 1872; it was photographed by Brainerd in 1878.

The station was rebuilt in November 1872, remodeled in 1885, and again rebuilt in December 1906, when the second station was moved to a private location. The current station building was erected in 1909. The station also contains an old-style wooden shelter on the eastbound tracks, and a former interlocking tower. This former tower, known as LOCUST Tower, now serves as a Nassau County Police Department booth for the Second Precinct's patrolmen assigned to the area.

This station has two high-level side platforms, each four cars long. A siding just west of the station served the Nassau-Suffolk Lumber until the late 1970s. The Oyster Bay Branch becomes a single track line a few hundred feet beyond the Birch Hill Road crossing at LOCUST interlocking. No bus access is available at the station.

Platform A, side platform
Track 1	←      Oyster Bay Branch toward Jamaica, Long Island City, or Penn Station (Glen Cove)
Track 2	←      Oyster Bay Branch toward Oyster Bay (Terminus) →
Platform B, side platform

• Media related to Locust Valley (LIRR station) at Wikimedia Commons
• Locust Valley – LIRR
• Locust Valley LIRR timetable
• Unofficial LIRR History Website
  • View from Parking Lot
  • View from Westbound and Eastbound platforms
• LOCUST Interlocking (The LIRR Today)
• Station from Birch Hill Road from Google Maps Street View