John Longhurst (born 1940) was an organist for the Mormon Tabernacle Choir for 30 years. He is also noted for writing the music to the Latter-day Saint hymn "I Believe in Christ" and being one of the few main forces behind the design of the Conference Center organ.
As a child, Longhurst lived on a ranch near Placerville, California. In 1949, his father died and the family moved to Salt Lake City, Utah. As a young man, Longhurst served as a Mormon missionary in the Atlantic States Mission of The Church of Jesus Christ of Latter-day Saints.
Longhurst earned a bachelor's and a master's degrees in music from the University of Utah and a Ph.D. from the Eastman School of Music at the University of Rochester.
During the mid-1960s, Longhurst was a member of the Mormon Tabernacle Choir.
Longhurst married Nancy Medrim, a native of Syracuse, New York, in the Salt Lake Temple in 1969. They are the parents of four children.
Longhurst served as a professor at Brigham Young University.
From 1977 to 2007 Longhurst served as a Mormon Tabernacle Choir organist.