Margaret Medlyn ONZM (born 7 October 1955) is a New Zealand opera singer and voice teacher.

Medlyn was born in Falmouth, Cornwall, England, on 7 October 1955,[1] and emigrated with her family to New Zealand in the early 1960s when she was five.

[3] Although she started out as a mezzo-soprano, her voice gradually moved upwards and she began to perform as a soprano.

[7][8] Medlyn joined the New Zealand School of Music in 2007, and was head of voice at Victoria University of Wellington.

[11] In the 2012 Queen's Birthday and Diamond Jubilee Honours, Medlyn was appointed an Officer of the New Zealand Order of Merit, for services to opera.