Address: 9000 Old River Road, Marcy, NY, United States, New York, USA 13403. Description: Marcy Correctional Facility is located in Oneida County New York. It is a medium security correctional facility. The current capacity of this prison is 1,122 adult males. A Residential Mental Health Unit treats inmates who suffer from mental disorders, and the facility shares it's location with the Central New York Psychiatric Center.