Rulon Timpson Jeffs (December 6, 1909 – September 8, 2002), known to followers as Uncle Rulon, was an American polygamist and religious leader who founded and was recognized as the 5th president of the Fundamentalist Church of Jesus Christ of Latter-Day Saints (FLDS Church), a Mormon fundamentalist organization based in Colorado City, Arizona, United States, from 1986 until his death in 2002.

[1] He was the father of later FLDS Church leader and convicted felon Warren Jeffs.

[4] In the spring of 1945, Jeffs, who had been working in northern Idaho since 1943, returned to Salt Lake City, where he was ordained a high priest apostle by Barlow on April 19.

Jeffs was a protege of both Barlow and later Priesthood Council senior Leroy S. Johnson, who compared their relationship to that of Brigham Young and Heber C. Kimball.

[citation needed] Jeffs was buried at the Isaac W. Carling Memorial Park in Colorado City.