The Theosophical Society is the organizational body of Theosophy, an esoteric new religious movement. It was founded in New York City, U.S. in 1875. Among its founders were Helena Blavatsky, a Russian mystic and the principal thinker of the Theosophy movement, and Henry Steel Olcott, the society's first president. It draws upon a wide array of influences among them older European philosophies and movements such as Neoplatonism and occultism, as well as parts of Asian religious traditions such as Hinduism, Buddhism, and Islam.

Theosophy is a religion established in the United States during the late 19th century. It was founded primarily by Helena Blavatsky and draws its teachings predominantly from Blavatsky's writings. Categorized by scholars of religion as both a new religious movement and as part of the occultist stream of Western esotericism, it draws upon both older European philosophies such as Neoplatonism and Indian originated religions such as Hinduism and Buddhism.