Heather Mary Harper (8 May 1930 – 22 April 2019) was a Northern Irish opera soprano. She first became known in 1954 for "Medea" at the Oxford University Opera Club. From 1956 to 1975, she was a member of the English Opera Group. She later became noted for her performances of Elsa in Strauss's "Arabella", Ellen Orford in Britten's "Peter Grimes" and as the Governess in Britten's "The Turn of the Screw". She retired in 1994.