Georgii Pavlovich Zeliony (Russian: Гео́ргий Па́влович Зелёный; 1878 in Odessa – 1951) was a Russian physiologist who contributed to the understanding of conditional and unconditional reflexes. He was one of I. P. Pavlov's first students. His studies of decorticated dogs led to knowledge of brain function in man and other animals. In addition, he was the first to articulate the theoretical underpinnings of sociophysiology.