The hospital’s name derives from the Creeds, a family that previously farmed the site. The name Creedmoor, comes from the phrase “Creed’s Moor,” describing the local geography In the early 1870s, New York State purchased land from the Creeds.
By 1959, the hospital housed 7,000 inpatients . Creedmoor is described as an overcrowded, understaffed, depressing institution in Susan Sheehan’s Is There No Place On Earth For Me? (1982)
The hospital’s census had declined by the early sixties, however, as the introduction of new medications, along with other factors, led to the deinstitutionalization of many psychiatric patients around the world. In 1975, the land in Glen Oaks formerly used to raise food for the hospital was opened to the public as the Queens Country Farm Museum. Another part of the campus in Glen Oaks was developed into the Queens Children’s Psychiatric Center. In 2004, the remaining part of Creedmore land in Glen Oaks was developed into the Glen Oaks public school campus, including The Queens High School of Teaching. By 2006, other parts of the Creedmoor campus had been sold and the inpatient census was down to 470 . There are several disused buildings on the property.