| Denomination | Largest in X States | Largest in X Metros | Largest in X Counties | One of 5 Largest in X States | Largest State | Largest Metro | States with Presence | Counties with Presence | Metros with Presence |
|   | From data in newly published book | Most adherents or congregations | Adherents or congregations | ||||||
| Albanian Orthodox Diocese of America | - | - | - | - | Illinois | Chicago | 2 | 2 | 2 |
| Allegheny Wesleyan Methodist Connection | - | - | - | - | Pennsylvania | Pittsburgh | 18 | 61 | 21 |
| American Baptist Association, The | - | - | - | 1 | Arkansas | Little Rock, AR | 46 | 594 | 159 |
| American Baptist Churches in the USA | - | 1 | 35 | 9 | New York | New York | 51 | 1,111 | 199 |
| American Carpatho-Russian Orthodox Greek Catholic Church | - | - | - | - | Pennsylvania | New York | 13 | 52 | 22 |
| Amish; Other Groups | - | - | - | - | Ohio | Philadelphia | 20 | 56 | 14 |
| Antiochian Orthodox Christian Archdiocese of North America, The | - | - | - | - | California | Boston | 44 | 160 | 103 |
| Apostolic Catholic Assyrian Church of the East, North American Dioceses | - | - | - | - | Illinois | Chicago | 7 | 14 | 10 |
| Apostolic Christian Church of America, Inc. | - | - | 1 | - | Illinois | Peoria, IL | 22 | 73 | 36 |
| Apostolic Christian Churches (Nazarean) | - | - | - | - | Ohio | Cleveland | 19 | 38 | 28 |
| Armenian Apostolic Church / Catholicossate of Cilicia | - | - | - | - | California | Los Angeles | 20 | 33 | 26 |
| Armenian Apostolic Church / Catholicossate of Etchmiadzin | - | - | - | - | California | New York | 27 | 70 | 54 |
| Assemblies of God | - | - | 4 | 16 | California | Los Angeles | 51 | 2,616 | 276 |
| Associate Reformed Presbyterian Church | - | - | - | - | South Carolina | Charlotte | 21 | 115 | 43 |
| Association of Free Lutheran Congregations, The | - | - | - | - | Minnesota | Minneapolis | 24 | 146 | 35 |
| Bahá'í | - | - | - | - | California | Los Angeles | 49 | 2,407 | 274 |
| Baptist General Conference | - | - | - | - | California | Minneapolis | 36 | 346 | 92 |
| Baptist Missionary Association of America | - | - | 4 | 2 | Texas | Dallas | 27 | 358 | 77 |
| Beachy Amish Mennonite Churches | - | - | - | - | Pennsylvania | Lancaster, PA | 22 | 78 | 20 |
| Brethren Church, The (Ashland, Ohio) | - | - | - | - | Ohio | Cleveland | 20 | 73 | 28 |
| Brethren In Christ Church | - | - | - | - | Pennsylvania | Harrisburg, PA | 21 | 88 | 37 |
| Bruderhof Communities, Inc. | - | - | - | - | New York | N.Y./Pittsburgh | 2 | 4 | 2 |
| Buddhism | - | - | - | - | California | Los Angeles | 48 | 359 | 149 |
| Bulgarian Orthodox Diocese of the USA | - | - | - | - | Michigan | Detroit | 7 | 9 | 8 |
| Calvary Chapel Fellowship Churches | - | - | - | - | California | Los Angeles | 48 | 380 | 165 |
| Catholic Church | 38 | 173 | 1,260 | 51 | California | New York | 51 | 2,987 | 276 |
| Christian and Missionary Alliance, The | - | - | 1 | - | Pennsylvania | New York | 51 | 709 | 201 |
| Christian Church (Disciples of Christ) | - | - | 4 | 2 | Texas | Kansas City | 47 | 1,290 | 237 |
| Christian Churches and Churches of Christ | - | - | 42 | 2 | Indiana | Indianapolis | 50 | 1,600 | 245 |
| Christian Reformed Church in North America | - | - | 2 | 1 | Michigan | Grand Rapids | 39 | 236 | 89 |
| Christian Union | - | - | - | - | Ohio | Kansas City | 7 | 59 | 16 |
| Church of God (Anderson, Indiana) | - | - | 1 | - | Ohio | Indianapolis | 49 | 990 | 213 |
| Church of God (Cleveland, Tennessee) | - | - | 1 | 2 | Georgia | Atlanta | 51 | 1,595 | 257 |
| Church of God General Conference | - | - | - | - | Illinois | Greenville, SC | 21 | 69 | 30 |
| Church of God in Christ, Mennonite | - | - | 1 | - | Kansas | Wichita, KS | 31 | 82 | 13 |
| Church of God of Prophecy | - | - | - | - | Tennessee | New York | 51 | 932 | 205 |
| Church of Jesus Christ of Latter-day Saints, The | 2 | 6 | - | 13 | Utah | Salt Lake City | 51 | 1,802 | 275 |
| Church of the Brethren | - | - | 1 | - | Pennsylvania | Washington | 39 | 432 | 106 |
| Church of the Nazarene | - | - | - | - | California | Los Angeles | 51 | 1,858 | 272 |
| Churches of Christ | - | - | 5 | 5 | Texas | Dallas | 51 | 2,429 | 275 |
| Churches of God, General Conference | - | - | - | - | Pennsylvania | Harrisburg, PA | 19 | 125 | 33 |
| Community of Christ | - | - | 1 | - | Missouri | Kansas City | 49 | 615 | 191 |
| Congregational Christian Churches, Additional (not part of any national CCC body) | - | - | - | - | Massachusetts | Boston | 22 | 79 | 22 |
| Conservative Baptist Association of America | - | - | 1 | - | California | Los Angeles | 40 | 418 | 107 |
| Conservative Congregational Christian Conference | - | - | - | - | California | Boston | 30 | 169 | 52 |
| Conservative Mennonite Conference | - | - | - | - | Ohio | Elkhart, IN | 22 | 59 | 22 |
| Coptic Orthodox Church | - | - | - | - | California | Los Angeles | 11 | 39 | 33 |
| Cumberland Presbyterian Church | - | - | - | - | Tennessee | Nashville | 20 | 269 | 51 |
| Duck River and Kindred Baptists Associations | - | - | - | - | Tennessee | Nashville | 4 | 25 | 4 |
| Eastern Pennsylvania Mennonite Church | - | - | - | - | Pennsylvania | Lancaster, PA | 13 | 34 | 9 |
| Enterprise Baptists Association | - | - | 2 | - | Kentucky | Columbus, OH | 3 | 26 | 6 |
| Episcopal Church | - | - | 4 | 13 | New York | New York | 51 | 2,118 | 275 |
| Evangelical Covenant Church, The | - | - | - | - | California | Chicago | 41 | 312 | 98 |
| Evangelical Free Church of America, The | - | - | - | - | California | Los Angeles | 48 | 720 | 183 |
| Evangelical Lutheran Church in America | - | 4 | 157 | 16 | Minnesota | Minneapolis | 51 | 1,756 | 267 |
| Evangelical Mennonite Church | - | - | - | - | Illinois | Peoria, IL | 6 | 23 | 12 |
| Evangelical Presbyterian Church | - | - | - | - | Michigan | Detroit | 28 | 121 | 59 |
| Fellowship of Evangelical Bible Churches | - | - | - | - | Nebraska | Omaha | 8 | 15 | 3 |
| Free Methodist Church of North America | - | - | 1 | - | Michigan | Los Angeles | 45 | 480 | 144 |
| Friends (Quakers) | - | - | 1 | - | North Carolina | Philadelphia | 49 | 573 | 182 |
| Fundamental Methodist Conference, Inc. | - | - | - | - | Missouri | Springfield, MO | 1 | 7 | 2 |
| General Association of Regular Baptist Churches | - | - | - | - | Michigan | Grand Rapids | 45 | 642 | 149 |
| General Six Principle Baptists | - | - | - | - | Pennsylvania | -none- | 1 | 1 | |
| Greek Orthodox Archdiocese of America | - | - | - | - | New York | New York | 50 | 336 | 184 |
| Greek Orthodox Archdiocese of Vasiloupulis | - | - | - | - | New York | New York | 14 | 30 | 20 |
| Hindu | - | - | - | - | California | New York | 42 | 206 | 93 |
| Holy Orthodox Church in North America | - | - | - | - | Massachusetts | Boston | 18 | 26 | 19 |
| Hutterian Brethren | - | - | - | - | South Dakota | Great Falls, MT | 5 | 60 | 4 |
| Independent Free Will Baptists Associations | - | - | 1 | - | Tennessee | Johnson City, TN | 10 | 53 | 6 |
| Independent, Charismatic Churches | - | - | - | - | California | Los Angeles | 47 | 305 | 156 |
| Independent, Non-Charismatic Churches | - | - | - | - | Texas | Dallas | 46 | 458 | 181 |
| International Church of the Foursquare Gospel | - | - | - | 1 | California | Los Angeles | 50 | 726 | 209 |
| International Churches of Christ | - | - | - | - | California | Los Angeles | 45 | 99 | 92 |
| International Council of Community Churches | - | - | - | - | Illinois | Chicago | 32 | 118 | 61 |
| International Pentecostal Church of Christ | - | - | - | - | Ohio | Dayton, OH | 14 | 49 | 18 |
| International Pentecostal Holiness Church | - | - | - | - | North Carolina | Oklahoma City | 43 | 627 | 151 |
| Interstate & Foreign Landmark Missionary Baptists Association | - | - | - | - | Mississippi | Hattiesburg, MS | 6 | 30 | 9 |
| Jain | - | - | - | - | New York | New York | 25 | 71 | 50 |
| Jasper Baptist and Pleasant Valley Baptist Associations | - | - | 1 | - | Georgia | Atlanta | 1 | 5 | 1 |
| Jewish Estimate | - | - | 81 | 14 | New York | New York | 51 | 672 | 262 |
| Landmark Missionary Baptists, Independent Associations and Unaffiliated Churches | - | - | - | - | Mississippi | Los Angeles | 5 | 31 | 9 |
| Lutheran Church--Missouri Synod | - | - | 24 | 11 | Illinois | Chicago | 51 | 1,801 | 264 |
| Macedonian Orthodox Church: American Diocese | - | - | - | - | Michigan | Chicago | 9 | 17 | 13 |
| Malankara Archdiocese of the Syrian Orthodox Church in North America | - | - | - | - | New York | New York | 11 | 18 | 13 |
| Malankara Orthodox Syrian Church, American Diocese of the | - | - | - | - | New York | New York | 15 | 35 | 21 |
| Mennonite Brethren Churches, U.S. Conference of | - | - | - | - | California | Fresno, CA | 19 | 82 | 34 |
| Mennonite Church USA | - | - | 3 | - | Pennsylvania | Lancaster, PA | 46 | 400 | 121 |
| Mennonite; Other Groups | - | - | - | - | Pennsylvania | Lancaster, PA | 42 | 237 | 52 |
| Midwest Congregational Christian Fellowship | - | - | - | - | Indiana | Muncie, IN | 2 | 8 | 2 |
| Missionary Church, The | - | - | - | - | Indiana | Los Angeles | 26 | 136 | 48 |
| Moravian Church in America--Alaska Province | - | - | - | - | Alaska | Anchorage, AK | 1 | 3 | 1 |
| Moravian Church in America--Northern Province | - | - | - | - | Pennsylvania | Allentown, PA-NJ | 14 | 44 | 19 |
| Moravian Church in America--Southern Province | - | - | - | - | North Carolina | Greensboro | 4 | 19 | 10 |
| Muslim Estimate | - | - | 1 | - | California | New York | 51 | 424 | 204 |
| National Association of Congregational Christian Churches | - | - | - | - | Michigan | Detroit | 38 | 232 | 76 |
| National Association of Free Will Baptists | - | - | 5 | - | Oklahoma | Johnson City, TN | 41 | 710 | 156 |
| National Primitive Baptist Convention, USA | - | - | - | - | Florida | Huntsville, AL | 19 | 147 | 51 |
| Netherlands Reformed Congregations | - | - | - | - | Iowa | Grand Rapids | 8 | 13 | 9 |
| New Hope Baptist Association | - | - | - | - | Georgia | Atlanta | 1 | 6 | 1 |
| New Testament Association of Independent Baptist Churches and other Fundamental Baptist Associations/Fellowships | - | - | 1 | - | Indiana | Indianapolis | 18 | 314 | 67 |
| North American Baptist Conference | - | - | - | - | California | Sacramento | 27 | 167 | 50 |
| "Old" Missionary Baptists Associations | - | - | 3 | - | Georgia | Atlanta | 11 | 85 | 15 |
| Old Order Amish Church | - | - | 2 | - | Pennsylvania | Lancaster, PA | 24 | 238 | 40 |
| Old Order Mennonite | - | - | - | - | Pennsylvania | Lancaster, PA | 15 | 51 | 11 |
| Old Order River Brethren | - | - | - | - | Pennsylvania | Lancaster, PA | 2 | 3 | 2 |
| Original Free Will Baptists | - | - | 1 | - | North Carolina | Raleigh | 2 | 38 | 10 |
| Orthodox Church in America: Albanian Orthodox Archdiocese | - | - | - | - | Massachusetts | Boston | 6 | 9 | 6 |
| Orthodox Church in America: Bulgarian Diocese | - | - | - | - | California | Los Angeles | 6 | 15 | 10 |
| Orthodox Church in America: Romanian Orthodox Episcopate of America | - | - | - | - | Illinois | Chicago | 20 | 45 | 32 |
| Orthodox Church in America: Territorial Dioceses | - | - | 5 | 1 | Alaska | Anchorage, AK | 42 | 226 | 100 |
| Orthodox Presbyterian Church, The | - | - | - | - | Pennsylvania | Philadelphia | 45 | 217 | 96 |
| Patriarchal Parishes of the Russian Orthodox Church in the USA | - | - | - | - | Pennsylvania | New York | 12 | 29 | 18 |
| Pentecostal Church of God | - | - | - | - | California | San Francisco | 45 | 574 | 128 |
| Presbyterian Church (U.S.A.) | - | - | 3 | - | Pennsylvania | New York | 51 | 2,377 | 272 |
| Presbyterian Church in America | - | - | - | 13 | Florida | Washington | 49 | 631 | 192 |
| Primitive Baptist Churches--Old Line | - | - | - | - | Georgia | Atlanta | 31 | 713 | 141 |
| Primitive Baptists, Eastern District Association of | - | - | - | - | Tennessee | Johnson City, TN | 4 | 15 | 2 |
| Primitive Methodist Church in the USA | - | - | - | - | Pennsylvania | Scranton, PA | 10 | 35 | 15 |
| Progressive Primitive Baptists | - | - | - | - | Georgia | Savannah, GA | 10 | 71 | 22 |
| Protestant Reformed Churches in America | - | - | - | - | Michigan | Grand Rapids | 10 | 15 | 7 |
| Reformed Baptist Churches | - | - | - | - | California | New York | 47 | 167 | 76 |
| Reformed Church in America | - | - | 4 | - | Michigan | New York | 31 | 237 | 73 |
| Reformed Church in the United States | - | - | - | - | South Dakota | Minneapolis | 13 | 35 | 16 |
| Reformed Mennonite Church | - | - | - | - | Pennsylvania | Lancaster, PA | 5 | 9 | 5 |
| Romanian Orthodox Archdiocese in America and Canada | - | - | - | - | Massachusetts | Boston | 10 | 12 | 10 |
| Russian Orthodox Church Outside of Russia | - | - | - | - | California | New York | 34 | 101 | 55 |
| Salvation Army, The | - | - | 1 | - | California | New York | 51 | 818 | 271 |
| Separate Baptists in Christ | - | - | - | - | Kentucky | Kokomo, IN | 9 | 35 | 7 |
| Serbian Orthodox Church in the USA | - | - | - | - | Illinois | Chicago | 27 | 61 | 42 |
| Serbian Orthodox Church in the USA (New Gracanica Metropolitanate) | - | - | - | - | California/Ohio/Illinois | Chicago | 17 | 32 | 21 |
| Seventh-day Adventist Church | - | - | 1 | - | California | Los Angeles | 51 | 1,747 | 273 |
| Sikh | - | - | - | - | California | Los Angeles | 38 | 118 | 70 |
| Southern Baptist Convention | 10 | 89 | 1,222 | 31 | Texas | Dallas | 51 | 2,670 | 276 |
| Southwide Baptist Fellowship | - | - | - | - | North Carolina | Washington | 34 | 327 | 104 |
| Strict Baptists | - | - | - | - | Michigan | Grand Rapids | 3 | 3 | 2 |
| Syrian Orthodox Church of Antioch | - | - | - | - | California | Los Angeles | 12 | 19 | 15 |
| Tao | - | - | - | - | California | San Francisco | 15 | 24 | 16 |
| Two-Seed-in-the-Spirit Predestinarian Baptists | - | - | - | - | Texas | Huntsville, AL | 4 | 4 | 1 |
| Ukrainian Orthodox Church of the USA | - | - | - | - | Pennsylvania | New York | 23 | 77 | 38 |
| Unitarian Universalist Association of Congregations | - | - | - | - | Massachusetts | Boston | 51 | 593 | 239 |
| United Church of Christ | - | - | 6 | 8 | Pennsylvania | Boston | 50 | 1,229 | 218 |
| United Methodist Church, The | 1 | 3 | 245 | 42 | Texas | Washington | 51 | 3,003 | 275 |
| United Reformed Churches in North America | - | - | - | - | Michigan | Grand Rapids | 18 | 34 | 17 |
| Universal Fellowship of Metropolitan Community Churches | - | - | - | - | Texas | Dallas | 47 | 179 | 129 |
| Vineyard USA | - | - | - | - | California | Los Angeles | 47 | 339 | 153 |
| Wayne Trail Missionary Baptist Association | - | - | - | - | Ohio | Lima, OH | 2 | 9 | 4 |
| Wesleyan Church, The | - | - | 2 | - | Michigan | Grand Rapids | 49 | 766 | 175 |
| Wisconsin Evangelical Lutheran Synod | - | - | - | 1 | Wisconsin | Milwaukee | 48 | 535 | 167 |
| Zoroastrian | - | - | - | - | California | Los Angeles | 15 | 26 | 20 |