Donald Henry Kay AM (born 25 January 1933) is an Australian classical composer.

[2] He received his first commission in 1966, Organ Sonata, broadcast on ABC national radio by John Nicholls,[6] the Hobart City Organist, in 1967.

Active as a music tutor from the late 1960s to the middle 1970s with the Tasmanian Youth Theatre, Secheron House,[7] Battery Point, Kay also composed a number of scores for production by the Tasmanian Puppet Theatre[8] as well as Theatre Royal professional productions e.g. Richard II (Shakespeare), The Imaginary Invalid (Molière), the Wakefield Miracle Plays (Tasmania Festival, 1970) at that time.

[11] In June 1991 Don Kay was appointed a Member of the Order of Australia for his contribution to the arts and particularly to music composition.

He retired from the staff of the Tasmanian Conservatorium of Music in 1998, having served as head of department from 1990 to 1993[2] and has since been appointed adjunct professor in composition.