Roy Albert DeMeo (; September 7, 1940 – January 10, 1983) was an American mobster who was a soldier in the Gambino crime family of New York City.
He headed the DeMeo crew, which became notorious for the large number of alleged murders it committed and for the grisly way they disposed of the bodies, which became known as "the Gemini Method".
The gang committed in excess of 100 murders, with the majority of them being committed by DeMeo himself.