Douglas A. Rossman is a U.S. herpetologist specialized on Garter snakes.

He studied at the University of Florida, where he got a Ph.D. in 1961.

He was a professor of zoology at the Louisiana State University in Baton Rouge, Louisiana and has retired only recently.

He co-authored The Amphibians and Reptiles of Louisiana (ISBN 0-8071-2077-4), and also The Garter Snakes: Evolution and Ecology (ISBN 0-8061-2820-8).

His wife, Nita J. Rossman (b. 1936), also has an interest in herpetology and even had a subspecies named after her: Thamnophis sauritus nitae, a subspecies of the Eastern Ribbon Snake. She had collected the holotype for this subspecies on a field trip with her husband for his dissertation research, and he named it in her honor.