Elder William K. Jackson was sustained as a General Authority Seventy of The Church of Jesus Christ of Latter-day Saints on April 4, 2020. At the time of his call, he had been serving as a bishop. He served as an Area Seventy and a member of the Third and Eighth Quorums of the Seventy in the Asia and Australia/Pacific Areas from 2003 to 2009. He is currently serving at Church headquarters in Salt Lake City, Utah, as Assistant Executive Director in the Missionary Department. He is also serving as the chairman of Missionary Health Services and the Medical Advisory Committee.
Elder Jackson has served in a number of Church callings, including as full-time missionary in the Bolivia La Paz Mission and president of the India New Delhi Mission (2009–2012).
Elder Jackson attended Brigham Young University for three years. He was awarded a bachelor of science degree from the University of California, Berkeley, and received a doctor of medicine degree from the University of California, San Francisco, in 1983. He worked at McKay-Dee Hospital from 1983 to 1986 for his medical residency and became a certified family physician. He worked and lived overseas with his family for 26 years as regional medical officer for the US State Department and medical doctor for the Department of the Air Force. At the time of his call as a General Authority, he was serving as medical director of Valley Family Health Care.
William King Jackson was born in Washington, D.C., on March 29, 1956. He married Ann Kesler in 1977. They are the parents of eight children.