Dame Katharine Annis Calder Gillie DBE ERCP (Lond) FRCGP (3 August 1900 in London – 10 April 1985 in Bledington, Oxfordshire) was a British physician and medical researcher. She was President of the Royal College of General Practitioners and the first woman serving as vice-chair of the British Medical Association (BMA). The third BMA committee on general practice was set up in 1961 under Gillie and was charged with guiding the general practice in Great Britain.