The Church of Jesus Christ is an international Christian religious denomination headquartered in Monongahela, Pennsylvania, United States. Organized at Green Oak, Pennsylvania, U.S.A. in the year 1862. The church is a Christian Restorationist church and accepts the Book of Mormon as scripture. The church considers itself the gospel restored, or the original church and good news as established by Jesus Christ in the New Testament, restored upon the earth. It also claims to be the spiritual successor to the Church of Christ, organized by Joseph Smith on April 6, 1830. The church sees Sidney Rigdon as Smith's rightful successor following the assassination of Smith because Rigdon was Smith's first counselor in the First Presidency. The church is not officially affiliated with any other church, organization or denomination.

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.