| A Christian Ministry in the National Parks | Denver | Colorado | Nondenominational |
| Abilene Christian University, Graduate School of Theology | Abilene | Texas | Churches of Christ |
| Acadia Divinity College | Wolfville | Nova Scotia | United Baptist Convention (Atlantic Provinces) |
| Ambrose Seminary | Calgary | Alberta | Christian and Missionary Alliance |
| American Baptist Seminary of the West | Berkeley | California | American Baptist Churches in the USA |
| American Theological Library Association | Chicago | Illinois | |
| Anabaptist Mennonite Biblical Seminary | Elkhart | Indiana | Mennonite Church |
| Anderson University School of Theology | Anderson | Indiana | Church of God (Anderson, Indiana) |
| Andover Newton Theological School | Newton Centre | Massachusetts | Am. Bapt. Churches in US & UCC |
| Aquinas Institute of Theology | St. Louis | Missouri | Roman Catholic |
| Asbury Theological Seminary | Wilmore | Kentucky | Interdenominational/Multidenominational |
| Ashland Theological Seminary | Ashland | Ohio | Brethren Church (Ashland, Ohio) |
| Asociacion Para La Educacion Teologica Hispana | Aurora | Colorado | |
| Assemblies of God Theological Seminary | Springfield | Missouri | Assemblies of God |
| Associated Canadian Theological Schools (ACTS) | Langley | British Columbia | Interdenominational/Multidenominational |
| Association for Biblical Higher Education | Orlando | Florida | |
| Association of Governing Boards of Universities and Colleges | Washington | District of Columbia | |
| Association of Theological Schools | Pittsburgh | Pennsylvania | Nondenominational |
| Athenaeum of Ohio | Cincinnati | Ohio | Roman Catholic |
| Atlantic School of Theology | Halifax | Nova Scotia | Interdenominational/Multidenominational |
| Auburn Theological Seminary | New York | New York | Nondenominational |
| Austin Presbyterian Theological Seminary | Austin | Texas | Presbyterian Church (USA) |
| Baptist Missionary Association Theological Seminary | Jacksonville | Texas | Baptist Missionary Association of America |
| Baptist Theological Seminary at Richmond | Richmond | Virginia | Cooperative Baptist Fellowship |
| Barry University Department of Theology and Philosophy | Miami Shores | Florida | Roman Catholic |