William A. Wimsatt (born July 28, 1917 – died, January 9, 1985) was professor of Zoology and Chairman of the Department of Zoology at Cornell University. From 1945 until 1960, Wimsatt taught courses in histology and embryology in the College of Arts and Sciences and also in the New York State College of Veterinary Medicine. He was well known for his pioneering research on the interrelationships of hibernation and reproduction and the biology of bats.