Dame Emily Mathieson Blair DBE RRC (1892-25 December 1963) was a Scottish nurse and Matron-in-Chief of both the Princess Mary's Royal Air Force Nursing Service and the British Red Cross Society. Blair trained at the Western Infirmary in Glasgow and during the first world war served with the Queen Alexandra's Royal Army Nursing Corps. When the Royal Air Force was formed in 1918 she moved to the Princess Mary's Royal Air Force Nursing Service becoming Matron-in-Chief in 1938. During the second world war she was mentioned-in-dispatches.