Ian Mackay or MacKay may refer to:
Ian Mackay (field hockey) (born 1938), Olympic hockey player Ian Mackay (footballer) (born 1986), Spanish professional footballer Ian MacKay (born 1994), Canadian lacrosse player Ian Reay Mackay (born 1922), Australian immunologist Ian Mackay (rugby league) (born 1952), Australian rugby league player
See also Ian McKay (disambiguation) Iain Mackay (disambiguation) Ian MacKaye (born 1962), American singer, musician and producer