Brentwood is a station on the Main Line (Ronkonkoma Branch) of the Long Island Rail Road.

The actual station is located across the tracks from the dead end of Eighth Street near Leroy Avenue.

It was moved as part of a major electrification and reconstruction project of the line in Ronkonkoma, Central Islip, Brentwood, Deer Park, and Wyandanch.

Originally, the LIRR had planned to merge Deer Park, Pineaire, and Brentwood stations into a single station, but residential opposition blocked that proposal, and only Deer Park and Pineaire were merged.

[5] The site was replaced with the former Pineaire in 1915, until it was closed in 1986 and combined into the new Deer Park west of Sagtikos State Parkway.