John Bush (born August 24, 1963 in Los Angeles, CA) is an American vocalist, currently a member of Armored Saint, a traditional metal band from Los Angeles, California and best known as a former member of the thrash metal band Anthrax, which he joined in 1992 following the departure of Joey Belladonna, and left in 2005 because of Among the Living lineup reunion.

John Barnard Bush OBE CStJ JP (born Marlborough, Wiltshire, 1937) is the current Lord Lieutenant of the English county of Wiltshire, serving since 2004. He had previously been the county's High Sheriff.