| A Chik Bible School | India | school |
| Aarhus Universitet det Teologiske Fakultet | Denmark | Faculty of Theology |
| Abbey of New Clairvaux Trappist Seminary | USA | Seminary |
| Abilene Christian University | USA | university |
| Abo Akademi University Faculty of Theology | Finland | Faculty of Theology |
| Abteilung für Katholische Theologie der Ruhr-Universität | Germany | faculty |
| Acadia Divinity College | Canada | college |
| Accredited Council for Theological Education in Africa | Kenya | association |
| Accrediting Council for Theological Education in Africa | Nigeria | association |
| Achik Bible School | India | school |
| ACTS Institute | India | institute |
| Adejobi Memorial Theological Seminary | Nigeria | Seminary |
| Adelaide College | United Kingdom | college |
| Adisadel College | Ghana | college |
| Aduku Diocesan Theological College | Uganda | college |
| Adventist International Institute of Advanced Studies | Philippines | Seminary |
| AFM of South Africa Theological Institute | South Africa | Theological Institute |
| Africa Bible College | South Africa | College |
| Africa School of Missions | South Africa | school |
| Africa University Faculty of Theology | Zimbabwe | Faculty of Theology |
| African Christian Church and Schools | Kenya | school |
| African Network of Institutions Preparing Anglicans for Ministry | Kenya | association |
| AG Tamilnadu Bible College | India | College |
| Agape Flights | USA | |
| Aglipay Central Theological Seminary | Philippines | Seminary |
| Aizawl Theological College | Bangladesh | College |
| Aizawl Theological College | India | College |
| Aizuto Bible Institute | India | institute |
| Akademi Theologia GKST | Indonesia | academy |
| Alan Knight Training Centre | Guyana | school |
| Alaska Bible College | USA | College |
| Alberta Bible College | Canada | College |
| Aldersgate College | Canada | college |
| Alderson-Broaddus College | USA | college |
| Aletheia Centre | Republic of South Africa | school |
| Algemene Doopsgezinde Societeit | Netherlands | academy |
| All Africa Bible College | South Africa | College |
| All Africa Conference of Churches | Kenya | Regional Ecumenical Organization |
| All India Mission Seminary | India | Seminary |
| All Nations Christian College | United Kingdom | College |
| Allahabad Bible Seminary | India | Seminary |
| Alliance Bible Seminary | Hong Kong, China | Seminary |
| Alliance Biblical Seminary | Philippines | Seminary |
| Alliance Biblical Seminary | Philippines | Seminary |
| Alliance Biblical Seminary | Philippines | Seminary |
| Alliance Theological Seminary | USA | Seminary |
| Alokolum National Seminary | Uganda | seminary |
| Alt-Katholisches Seminar der Universität Bonn | Germany | Seminary |
| AMECEA Pastoral Institute | Kenya | institute |
| American Association of Bible Colleges | USA | association |
| American Baptist College | USA | college |
| American Baptist Seminary of the West | USA | Seminary |
| American Indian College of the Assemblies of God | USA | College |
| Anderson Theological College | India | College |
| Anderson University | USA | university |
| Andhra Christian Theological College | India | college |
| Andhra Christian Theological College | India | college |
| Andover Newton Theological School | USA | Seminary |
| Andrews University Seminary | USA | Seminary |
| Anglican Institute of Theology St Stephen's Hall | Australia | institute |
| Anglican School of Theology | USA | school |
| Anglican Theological College | Malaysia | college |
| Anglican Training Centre | Gambia | school |
| Ansgar Teologiske Seminar | Norway | Seminary |
| AOG World Harvest Institute | Australia | Institute |
| Aparri Bible Seminary | Philippines | seminary |
| Apostles of Jesus Major Seminary | Kenya | Major Seminary |
| Appalachian Bible College | USA | college |
| Aquinas Institute of Theology | USA | Faculty of Theology |
| Arab Baptist Theological Seminary | Lebanon | seminary |
| Archbishop Luwum Theological College | Uganda | Seminary |
| Archbishop Olufosoye Training Centre | Nigeria | school |
| Arizona College of the Bible | USA | college |
| Arlington Baptist College | USA | college |
| Arthur Turner Training School | Canada | Seminary |
| Ashland University | USA | Seminary |
| Asia Baptist Theological Seminary | Philippines | Seminary |
| Asia Centre for Theological Studies and Mission | Republic of Korea (South) | school |
| Asia Graduate School of Theology | India | school |
| Asia Pacific Nazarene Theological Seminary | Philippines | Seminary |
| Asia Pacific Nazarene Theological Seminary | Philippines | seminary |
| Asia Pacific Theological Seminary | Philippines | Seminary |
| Asia Theological Association | India | association |
| Asia Theological Association (WEF) | Taiwan | association |
| Asian Institute for Liturgy and Music | Philippines | institute |
| Asian Seminary Christian Ministries | Philippines | Seminary |
| Asian Theological Seminary | Philippines | seminary |
| Asociación de Mujeres Teologas y Pastoras de América Latina y el Caribe | Costa Rica | association |
| Asociación de Seminarios e Instituciones Teológicos | Argentina | association |
| Asociación Latinoamericana de Institutiones de Educación Teológica | Costa Rica | association |
| Assam Baptist Theological Seminary | India | seminary |
| Assemblies of God Bible College | Sri Lanka | College |
| Assemblies of God Bible College | Jamaica | college |
| Assemblies of God Bible College | United Kingdom | College |
| Assemblies of God Central Bible College | Japan | College |
| Assemblies of God Mid-Ghana Bible Institute | Ghana | Bible School |
| Assemblies of God Northern Ghana Bible Institute | Ghana | Institute |
| Assemblies of God Theological Seminary | USA | Seminary |
| Assn des Institutions d'Enseignement Théologique en Afrique Central | DR Congo | institute |
| Assn des Institutions d'Enseignement Théologique en Afrique Occidentale | Cameroon | association |
A worldwide fellowship of 349 churches seeking unity, a common witness and Christian service 
