David Hay (born 29 January 1948) is a Scottish former football player and manager. He broke into the Celtic team in the late 1960s, as one of a generation of players who continued a highly successful era for the club. A contract dispute between Hay and Celtic led to him being transferred to Chelsea in 1974. He played in over 100 league games for Chelsea, but was forced to retire in 1979 due to a detached retina. Hay appeared in 27 international matches for Scotland, and was selected for their 1974 FIFA World Cup squad.