The International Society for Krishna Consciousness (ISKCON), known colloquially as the Hare Krishna movement or Hare Krishnas, is a Gaudiya Vaishnava Hindu religious organization. ISKCON was founded in 1966 in New York City by A. C. Bhaktivedanta Swami Prabhupada. Its core beliefs are based on Hindu scriptures, particularly the Bhagavad Gita and the Bhagavata Purana, and the Gaudiya Vaishnava tradition, which has had adherents in India since the late 15th century and American and European devotees since the early 1900s.

ISKCON is a direct descendant of Brahma-Madhva-Gaudiya Vaishnava Sampradaya. The appearance of the movement and its culture comes from the Gaudiya Vaishnava tradition, which has had adherents in India since the late 15th century and western converts since the early 1930s. ISKCON was formed to spread the practice of bhakti yoga, in which those involved (bhaktas) dedicate their thoughts and actions towards pleasing the Supreme Lord, Krishna.

ISKCON today is a worldwide confederation of more than 400 centers, including 60 farm communities, some aiming for self-sufficiency, 50 schools, and 90 restaurants. In recent decades the movement's most rapid expansions in terms of numbers of membership have been within Eastern Europe (especially since the collapse of the Soviet Union) and India.