For other uses, see Pavlov (disambiguation).

Ivan Petrovich Pavlov (Russian: Иван Петрович Павлов, September 14, 1849 – February 27, 1936) was a Russian, and later Soviet, physiologist, psychologist, and physician. He was awarded the Nobel Prize in Physiology or Medicine in 1904 for research pertaining to the digestive system. Pavlov is widely known for first describing the phenomenon of classical conditioning.

Ivan Pavlov was born in Ryazan, Russia. He began his higher education as a student at the Ryazan Ecclesiastical Seminary, but then dropped out and enrolled in the University of Saint Petersburg to study the natural sciences and become a physiologist. He received his doctorate in 1879.