Dame Katharine Annis Calder Gillie DBE FRCP (Lond) FRCGP (3 August 1900 in Eastbourne– 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 to serve as Vice-Chair of the British Medical Association (BMA).

[1] During World War II, she moved with her two children to a country cottage at Pangbourne, continuing her medical work there until retirement in 1963.

Gillie was noted for helping recover UK general practice after World War II.

[1] In 1961–63, she chaired a sub-committee set up by the Standing Medical Advisory Committee to guide the development of general practice in Britain.