Pilgrim Psychiatric Center, formerly known as Pilgrim State Hospital, is a state-run psychiatric hospital located in Brentwood, New York. Nine months after its official opening in 1931, the hospital's patient population was 2,018, as compared with more than 5,000 at the Georgia State Sanitarium in Milledgeville, Georgia. At its peak in 1954, Pilgrim State Hospital could claim to be the largest mental hospital in the U.S., with 13,875 patients.