John Pfahl (February 17, 1939 in New York City, New York) is an American photographer.
Pfahl grew up in Wanaque, New Jersey. He is known for his landscape photography such as his 1974 “Altered Landscapes” series. He received a BFA from Syracuse University in the School of Art and his MA from Syracuse University in the School of Communications. He taught at the Rochester Institute of Technology, Rochester, New York, from 1968–1983. Later he was professor at the University of New Mexico, Albuquerque. Presently (2012) he teaches at the University at Buffalo, The State University of New York.