John W. Welch (1946- ) discovered chiasmus in the Book of Mormon and founded the Foundation for Ancient Research and Mormon Studies (FARMS).

John W. Welch was born in 1946. In 1967, while serving in the LDS South German Mission, Welch and his companion attended a lecture in the Catholic Priesterseminar which talked about the use of chiasmus in the Gospel of Matthew. Two weeks later, he discovered chiasmus in the Book of Mormon and began to correspond with family members and scholars on the subject. In 1968, when he returned from his mission, he attended BYU for two years, earning a B.A. and M.A. in 1970. He attended Oxford as a Woodrow Wilson Fellow after that, and then attended Duke Law School from 1972 to 1975. He began working for the law firm O’Melveny and Meyers in Los Angeles in 1975 and worked until 1980, all the while corresponding with scholars about chiasmus studies. In 1979, he organized the Foundation for Ancient Research and Mormon Studies (FARMS) in Los Angeles, and in July 1980 he accepted a job offer to teach at the J. Reuben Clark Law School at BYU. He continued to work with FARMS and BYU, furthering the historiography and knowledge of chiasmus. From 1988 to 1991, he served as an editor of the Encyclopedia of Mormonism and from 1991 to 2007 he was the editor-in-chief of BYU Studies. Today, he still researches chiasmus and works on the Joseph Smith Papers project.

He is married to the former Jeannie Sutton, and they have four children and sixteen grandchildren.