Charles T. Tart, Ph.D. (1937– ) is internationally known for his psychological work on the nature of consciousness (particularly altered states of consciousness), as one of the founders of the field of transpersonal psychology, and for his research in scientific parapsychology. His two classic books, Altered States of Consciousness (1969) and Transpersonal Psychologies (1975), became widely used texts that were instrumental in allowing these areas to become part of modern psychology.

Charles Tart was born in 1937 and grew up in Trenton, New Jersey. He was active in amateur radio and worked as a radio engineer (with a First Class Radiotelephone License from the Federal Communications Commission) while a teenager. Tart studied electrical engineering at the Massachusetts Institute of Technology before electing to become a psychologist.

He received his doctoral degree in psychology from the University of North Carolina at Chapel Hill in 1963, and then received postdoctoral training in hypnosis research with Professor Ernest R. Hilgard at Stanford University. He is currently (2005) a Core Faculty Member at the Institute of Transpersonal Psychology (Palo Alto, California) and a Senior Research Fellow of the Institute of Noetic Sciences (Sausalito, California), as well as Professor Emeritus of Psychology at the Davis campus of the University of California, where he served for 28 years.

He was the first holder of the Bigelow Chair of Consciousness Studies at the University of Nevada in Las Vegas and has served as a Visiting Professor in East-West Psychology at the California Institute of Integral Studies, as an Instructor in Psychiatry at the School of Medicine of the University of Virginia, and a consultant on government funded parapsychological research at the Stanford Research Institute (now known as SRI International). As well as a laboratory researcher, Tart has been a student of the Japanese martial art of Aikido (in which he holds a black belt), of meditation, of Gurdjieff's work, of Buddhism, and of other psychological and spiritual growth disciplines. His primary goal is to build bridges between the scientific and spiritual communities, and to help bring about a refinement and integration of Western and Eastern approaches for knowing the world and for personal and social growth.