Kenneth Earl Wilber II (born January 31, 1949, Oklahoma City, USA) is an American philosopher and psychological theorist. His work focuses mainly on creating an "integral theory of consciousness" in which the insights of mysticism, postmodernism, science and systems theory come together to form a coherent picture of the cosmos. In Kosmic Consciousness, Wilber states that he considers himself a storyteller and a mapmaker; his stories address universal questions and his maps integrate various perspectives of the Kosmos.

Although he was at one time a major proponent of the transpersonal school of psychology, he has since disassociated himself from it. In 1998 Wilber founded the Integral Institute, a think-tank for studying issues of science and society in an integral way. He has been a pioneer in the development of Integral psychology and Integral spirituality.

In the January 1997 issue of the German newspaper Die Welt, a reviewer called Wilber "the foremost thinker in the field of the evolution of consciousness." According to Frank Visser, he is "the most translated academic author in the United States." He has also been called the "Einstein of Consciousness," and will "do for consciousness what Freud did for psychology."

Ken lives in Denver, CO where he heads up the Integral Institute, a non-profit organization dedicated to bringing the Integral Vision into the world through personal training, seminars, and multimedia products.