The “2004 Yearbook” reports on 215 U.S. church bodies with a record high total membership exceeding 161 million. Leading any other single U.S. church is the Catholic Church, reporting 66,407,105 adherents, followed by the Southern Baptist Convention (16,247,736) and the United Methodist Church (8,251,042). The Church of Jesus Christ of Latter-day Saints ranks 5th (5,410,544).
… From 2001-2002, major U.S. churches that grew included the Catholic Church, Southern Baptist Convention, Church of Jesus Christ of Latter-Day Saints, Assemblies of God, American Baptist Churches in the U.S.A., Jehovah’s Witnesses and Church of God (Cleveland, TN).
Recording membership losses were The United Methodist Church, Evangelical Lutheran Church in America, Presbyterian Church (U.S.A.), Lutheran Church (Missouri Synod), African Methodist Episcopal Zion Church and United Church of Christ….
The Church of Jesus Christ of Latter-Day Saints (Mormons), an American-born church, continues to grow remarkably, remaining the fifth largest church in the nation. Among the 15 largest churches, the LDS also reports the highest rate of growth at 1.88 percent in the last year, virtually the same as its previous growth rate.