Brentwood State Park, Athletic complex in Suffolk County, United States

Brentwood State Park is a 52-acre state park and athletic field complex in the hamlet of Brentwood, Suffolk County, New York. It holds eight artificial turf soccer fields and two artificial turf baseball fields, plus a maintenance building with a concession stand and restrooms. Its two entrances are on Crooked Hill Road (Suffolk CR 13) and Community College Drive (Suffolk CR 106).

Brentwood State Park occupies land that was part of the Pilgrim Psychiatric Center. As that facility was downsized in the late 1990s and early 2000s, a 460-acre portion was sold for redevelopment, and the developer transferred 52 acres to the New York State Office of Parks, Recreation and Historic Preservation for athletic fields. The park opened to the public in 2003, but most fields and improvements were finished only in 2009, after $15 million was spent on the property.

The park's name comes from Brentwood, the hamlet in the Town of Islip where it sits; the site was carved from Pilgrim Psychiatric Center land. Its eight artificial turf soccer fields and two baseball fields host league and school play, and a maintenance building with a concession stand and restrooms serves spectators.

Two entrances serve the park: one on Crooked Hill Road (Suffolk CR 13) and one on Community College Drive (Suffolk CR 106). A maintenance building on site holds a concession stand and restrooms. A playground was scheduled for completion in 2013.

The state acquired the 52-acre parcel from a developer who had bought 460 acres of the Pilgrim Psychiatric Center grounds for redevelopment. The park opened in 2003, but most fields were finished only in 2009 after $15 million in improvements. A playground was scheduled for completion in 2013.