Sir Douglas Andrew Kilgour Black (29 May 1913 – 13 September 2002) was a Scottish physician and medical scientist who played a key role in the development of the National Health Service. He conducted research in the field of public health and was famous as the author of the Black Report. He was also known for the Black Formula, a translation of the Pignet formula to British measurements. He was born in Delting Shetland in 1913, educated at Forfar Academy, and studied medicine at the Bute Medical School, University of St Andrews, graduating with MB ChB in 1933.