Seventy is a priesthood office in the Melchizedek priesthood of the Church of Jesus Christ of Latter-day Saints. Traditionally, a church member holding this priesthood office is a "traveling minister" and an "especial witness" of Jesus Christ, charged with the mission of preaching the gospel to the entire world under the direction of the Twelve Apostles. The church teaches that the office of seventy was anciently conferred upon the seventy disciples mentioned in the Gospel of Luke 10:1-2. Multiple individuals holding the office of seventy are referred to collectively as seventies.

The Church of Jesus Christ of Latter-day Saints, informally known as the LDS Church or Mormon Church, is a restorationist, nontrinitarian Christian denomination that is the largest denomination in the Latter Day Saint movement. The church is headquartered in the United States in Salt Lake City, Utah and has established congregations and built temples worldwide. According to the church, it has over 17 million members and over 99 thousand volunteer missionaries. As of 2012, the church was the fourth-largest Christian denomination in the U.S. As of 2023, the church reported over 6.8 million U.S. members.