James Henry Leuba (April 9, 1868 – December 8, 1946) was an American psychologist best known for his contributions to the psychology of religion.

His son Clarence James Leuba was also a psychologist and taught at Antioch College in Yellow Springs, Ohio.

[1] Leuba was born in Neuchâtel Switzerland, and later moved to America.

[1] His work was marked by a tendency to explain mysticism and other religious experiences in psychological terms.

[1] He argued for a naturalistic treatment of religion, which he considered to be necessary if religious psychology was to be looked at scientifically.