The Church of Christ was the original name of the Latter Day Saint church founded by Joseph Smith. Organized informally in 1829 in upstate New York and then formally on April 6, 1830, it was the first organization to implement the principles found in Smith's newly published Book of Mormon, and thus its establishment represents the formal beginning of the Latter Day Saint movement. Later names for this organization included the Church of the Latter Day Saints, the Church of Jesus Christ, the Church of God, the Church of Christ of Latter Day Saints, and the Church of Jesus Christ of Latter Day Saints.

The Latter Day Saint movement is the collection of independent church groups that trace their origins to a Christian Restorationist movement founded by Joseph Smith in the late 1820s.