David Christopher Gadsby FRS (March 26, 1947 - March 3, 2019) was a British physiologist, and Patrick A. Gerschel Family Professor Emeritus at The Rockefeller University. He was best known for his studies on the mechanisms by which ions move across cell membranes. He earned a BSc in 1969 and MSc in 1973, from the Trinity College, Cambridge, and Ph.D. in 1978 from University College London. He studied with Paul F. Cranefield. He won the Kenneth S. Cole Award of the Biophysical Society in 1995. He was elected Fellow of the Royal Society in 2005.