||This article relies largely or entirely upon a single source. (December 2013)
John Henry Clay (born 20 March 1955) is a British rower who competed in the 1976 Summer Olympics and in the 1980 Summer Olympics.
Clay was educated at Cambridge University. He rowed for Cambridge in The Boat Race in the 1974, 1975 and 1976 races. Cambridge won in 1975.
At the 1976 Summer Olympics Clay partnered David Sturge in the coxless pair and finished twelfth.
Four years later in the 1980 Summer Olympics Clay was a member of the British boat which won the silver medal in the eights competition.