Sing Sing Correctional Facility, formerly Ossining Correctional Facility, is a maximum-security prison operated by the New York State Department of Corrections and Community Supervision in the village of Ossining, New York. It is about 30 miles (48 km) north of Midtown Manhattan on the east bank of the Hudson River. It holds about 1,700 inmates and housed the execution chamber for the State of New York until the abolition of capital punishment in New York in 1977.

Ossining is a village in Westchester County, New York, United States. The population at the 2020 United States census was 27,551, an increase from 25,060 at the 2010 census. As a village, it is located in the town of Ossining.