Dame Ella Annie Noble Macknight, DBE, MRCOG, FRCOG, FAMA, FAGO (7 August 1904, Urana, New South Wales, Australia – 1 April 1997, Malvern, Victoria, Australia) was an obstetrician and gynaecologist who worked at the Queen Victoria Hospital, Melbourne.
She was appointed as a Dame Commander of the Order of the British Empire on 1 January 1969 for services to medicine.
She was educated privately and later attended Toorak College.
She earned her MB/BS in 1928 from the University of Melbourne, where she was resident from 1923 at Janet Clarke Hall, at that time still the women's section of Trinity College.
After qualifying as an obstetrician and gynaecologist (MD, 1931, DGO 1936), she was associated with the Queen Victoria Hospital from 1935-77.
Her appointments included honorary obstetrician and gynaecologist from 1935-64; vice-president of the Committee of Management for 1963-71 and president from 1971-77.She was president of the Council of the Royal College of Gynaecologists from 1970-72 and served as chairmen of the Blood Transfusion Committee, Victorian Division of the Red Cross Society from 1964-70 and a member of the Executive of the Victorian Division during the same period.