Joan Constance Churchill Bernard, FRSA (6 April 1918 – 1 August 2012) was Principal of Trevelyan College, University of Durham from its foundation in 1966 to 1978. During World War II, she was an officer of the Auxiliary Territorial Service and was instrumental in Britain's defence against V-1 and V-2 rockets. In later life, she was active in the Church of England.