Dr. Clifford Ladd Prosser (May 12, 1907 – February 3, 2002) was an American physiologist focused on research of comparative physiology of animals. ^{[1] [2]}

The American Physiological Society said "Ladd Prosser was among the few giants of comparative physiology in the second half of the twentieth century".^[2] He was a fellow of the American Academy of Arts and Sciences,^[2] a member of the National Academy of Sciences,^{[2] [3]} a Guggenheim fellow,^[2] and a recipient of 50th Anniversary Award of the American Society of General Physiologists.^[2] He served as editor of the journal Physiological and Biochemical Zoology.