There were approximately 2.1 billion Christians in the world as of 2011. The table below lists the twenty-five largest Christian denominations in the United States as of 2011.
| Denomination |
U.S. Population (in millions) |
| Roman Catholic Church |
68.5 |
| Southern Baptist Convention |
16.16 |
| United Methodist |
7.8 |
| Latter-day Saints (Mormons) |
6.1 |
| Church of God in Christ |
5.5 |
| National Baptist Convention, U.S.A. |
5 |
| Evangelical Lutheran Church in America |
4.54 |
| National Baptist Convention of America |
3.5 |
| Assemblies of God |
2.91 |
| Presbyterian Church (U.S.A.) |
2.77 |
| African Methodist Episcopal Church |
2.5 |
| National Missionary Baptist Convention of America |
2.5 |
| Lutheran Church—Missouri Synod (LCMS) |
2.31 |
| Episcopal Church |
2 |
| Churches of Christ |
1.64 |
| Greek Orthodox Archdiocese of America |
1.5 |
| Pentecostal Assemblies of the World |
1.5 |
| African Methodist Episcopal Zion Church |
1.4 |
| American Baptist Churches in the U.S.A. |
1.31 |
| Jehovah’s Witnesses |
1.16 |
| United Church of Christ |
1.1 |
| Church of God (Cleveland, Tennessee) |
1.07 |
| Christian Churches and Churches of Christ |
1.07 |
| Seventh-Day Adventist Church |
1.04 |
| Progressive National Baptist Convention |
1.01 |
