Walter Holbrook Gaskell FRS (1 November 1847; Naples – 7 September 1914; Great Shelford) was a British physiologist.The son of barrister John Dakin Gaskell, he was educated at Trinity College, Cambridge, receiving his BA in 1869. He worked in the Physiological Laboratory of the University of Cambridge, focusing on the physiology of the heart and the vascular and nervous systems. His research was central to the understanding of cardiac physiology.