Delta Phi Kappa (ΔΦΚ) (previously The Friars Club and Delta Phi), was a fraternity for male returned missionaries of the Church of Jesus Christ of Latter-day Saints (LDS Church) at colleges in Utah, Idaho, and Arizona.

[1] The society was formed at the suggestion of the university's new president, John R. Park, who wanted to "groom student speakers and debaters.

"[1] Although its charter members are unknown, Harry Culmer, Aaron Cummings, Theodore W. Curtis, W. C. Dunton Jr., John G. Felt, Lord Gilberson, C. P. Huey, Alonzo Hyde, Albert Kimball, S. H. Leaver, P. Margetts Jr., Arthur Pratt, Rolla Roberts, E. G. Taylor, Orson F. Whitney, and Alfales Young are listed as members in the society's minute books from 1872 to 1874.

[1] In addition to debates, the society of this era brought in guest speakers, hosted musical performances, and held balls or dances.

[3][4][2]: 19  Widtsoe counseled Covey and Jenkins on creating the group which had to open its membership to former missionaries of all faiths to obtain approval from the Board of Regents.

Elva Chipman and Sadye Eccles were the only women to join the fraternity; membership was restricted to men after the first year due to the lack of returned female missionaries.

[2]: 34 LDS Church leaders lobbied the Friars Club for a name change and also objected to some of the group's fraternity-like activities such as blackballing nominees.

[8][2]: 35–36  The two groups officially consolidated at a ceremony on April 3, 1931, adopting the name of Delta Phi and its history as the oldest fraternity in Utah.

[2]: 43  Delta Phi gained members and popularity during the 1930s, but membership in all chapters diminished during World War II except at the University of Utah, whose medical and engineering students were exempted from the United States draft.

[2]: vii  Delta Phi was led by volunteer national officers who brought the fraternity to other campuses and established housing for some members.

[2]: vii  Chapters provided special sacrament meetings to wards near their campuses as well as presented spiritual programs and talent shows for local prisons and mental hospitals.

In 1978, Delta Phi Kappa was absorbed by the LDS Church into Sigma Gamma Chi, which was open to all college-aged men and not restricted to returned missionaries.

[7]Members of the Friar's Club won a triangular pin over their hearts; the three sides represented faith, loyalty, and love.

[11]: 20 After the merger in 1931, Delta Phi adopted a new crest that included a shield that was decorated with a four-pointed jeweled star, the lamp of learning, a scroll, and the Greek letters ΔΦ.

[8] Member pins were a simplified version of the shield, featuring the star and Greek letters on a black background.