The Yearbook is produced annually by the National Council of Churches and is considered one of the most authoritative sources of church membership. The 2010 figures, released Tuesday, were collected from 228 U.S. denominations in 2011.
The Roman Catholic Church (No. 1) and the Southern Baptist Convention (No. 2) continued as the nation's largest churches in 2010, and both posted a decrease of less than 1 percent, the fourth year in a row of declining membership for Southern Baptists.
The Utah-based LDS Church saw a 1.62 percent spurt in membership, growing to 6.2 million in the U.S.
Overall, total membership in the top 25 largest churches declined 1.15 percent, to 145.7 million.
The Evangelical Lutheran Church in America, though still in the top 10, reported the sharpest decline in membership, dropping 5.9 percent to 4.3 million members.
Four Pentecostal churches out of the top 25 showed a continuing increase in membership, with the Pentecostal Assemblies of the World Inc. jumping 20 percent, the highest out of all reporting churches.
Only six out of the top 25 increased in membership, according to the Yearbook. Some of those growing denominations include Jehovah's Witnesses (up 1.85 percent), Seventh-day Adventist Church (up 1.61 percent) and the National Baptist Convention, USA (up 3.95 percent).
The 10 largest U.S. Christian bodies reported in the 2012 Yearbook are:
1. The Catholic Church: 68.2 million, down 0.44 percent.
2. Southern Baptist Convention: 16.1 million, down 0.15 percent.
3. The United Methodist Church: 7.7 million, down 1.22 percent.
4. The Church of Jesus Christ of Latter-day Saints: 6.2 million, up 1.62 percent.
5. The Church of God in Christ: 5.5 million, no membership updates reported.
6. National Baptist Convention, USA: 5.2 million, up 3.95 percent.
7. Evangelical Lutheran Church in America: 4.3 million, down 5.9 percent.
8. National Baptist Convention of America, 3.5 million, no membership updates reported.
9. Assemblies of God: 3.03 million, up 3.99 percent.
10. Presbyterian Church (USA): 2.7 million, down 3.42 percent.