| Built in 1825, Sing Sing Prison, in Ossining, Westchester County, was the scene of 614 legal executions from February 8, 1892 to August 15, 1963 - a period of 71 years and 6 months. More than 400 other persons sentences to death were admitted to Sing Sing Prison but escaped execution by various means during the period. |
| Three inmates were Federal prisoners who were put to death by the State for violations of Federal law, and the remaining 611 persons were State prisoners who had been convicted of capital crimes under New York State law. |
| All executions at Sing Sing were carried out by electrocution, in the electric chair, according to strict laws and procedures. From the beginning, all condemned convicts were segregated from other prisoners in individual condemned cells. |
| From 1889, persons condemned to death were sentenced to be executed in Auburn Prison, Clinton Prison or Sing Sing Prison; however from September 1, 1914, all death sentences were to be carried out exclusively at Sing Sing. |
| Starting in 1920, within Sing Sing's prison grounds, a specially constructed separate structure, known as the Death House, was used to house all condemned prisoners. |