John A. Danaher III (born August 22, 1950) is a Connecticut Superior Court Judge sitting in Litchfield, Connecticut. Between March 5, 2007, and May 5, 2010, he served as the Commissioner of the State of Connecticut Department of Public Safety. In addition, Judge Danaher previously served as the 47th United States Attorney for the District of Connecticut from May 2001 to November 2002 during which he supervised federal prosecutions of former Waterbury Mayor Philip Giordano and former Bridgeport Mayor Joseph Ganim.