Bernard A. Coyne (July 27, 1897May 20, 1921) was an American who was one of the tallest and one of only 29 individuals in medical history to have stood or more. Coyne may have reached a height of tall at the time of his death in 1921. His World War I draft registration card, dated August 29, 1918, lists his height as . The Guinness Book of World Records stated that he was refused induction into the Army when he stood at a height of .
Coyne was the tallest ever eunuchoidal infantile giant, a condition also known as gigantism. He was the tallest person in the world at the time of his death, like Robert Wadlow, he was still growing. He reportedly wore size 24 (American) shoes.
Bernard Coyne died in 1921. He is buried in Anthon, Iowa, in a specially-made, extra-large coffin.