The Essex County Hospital Center (also known as the Overbrook Hospital, the Overbrook Asylum, or simply the Overbrook) was a psychiatric hospital that was located around 125 Fairview Avenue in the Township of Cedar Grove, New Jersey. It was used as a general hospital then converted to house patients afflicted with mental disorders. The original hospital was located at the edge of the Hilltop Reservation and designated a Conservation Easement in 2001 by the New Jersey Department of Environmental Protection, the site now is part of the Essex County park system. A new hospital opened in 2006, and the site of the original hospital was converted to a park and townhomes in 2017.