David Newton Lumsdaine (born 31 October 1931) is an Australian composer. He studied at the New South Wales Conservatorium of Music (as it was then known). He moved to England in 1952 and for a while shared a flat with fellow expatriate, the poet Peter Porter, with whom he collaborated on several projects including the cantata Annotations of Auschwitz (1964). In London he studied composition at the Royal Academy of Music with Lennox Berkeley. In 1970 he took a lecturing position at Durham University. In 1981 he took a post as senior lecturer at King's College London. He is published by The University of York Music Press and Universal Edition.In 1979 He married the composer Nicola LeFanu.