| Algeria | Protestant Church of Algeria |
| American Samoa | Congregational Christian Church in American Samoa |
| Angola, Republic of | Evangelical Reformed Church of Angola |
| Angola, Republic of | Evangelical Congregational Church in Angola |
| Argentina | Evangelical Church of the River Plate |
| Argentina | Presbyterian Church of Argentina |
| Argentina | Reformed Churches in Argentina |
| Argentina | Evangelical Congregational Church |
| Australia | Uniting Church in Australia |
| Australia | Congregational Federation of Australia |
| Austria | Reformed Church in Austria |
| Bangladesh | St. Thomas' Church |
| Belgium | United Protestant Church of Belgium |
| Bolivia | Evangelical Presbyterian Church in Bolivia |
| Botswana | Dutch Reformed Church in Botswana |
| Brazil | Independent Presbyterian Church of Brazil |
| Brazil | United Presbyterian Church of Brazil |
| Brazil | Christian Reformed Church of Brazil |
| Brazil | Evangelical Reformed Churches in Brazil |
| Brazil | Arab Evangelical Church of Sao Paulo |
| Brazil | Presbyterian Church of Brazil |
| Bulgaria | Union of Evangelical Congregational Churches in Bulgaria |
| Burkina Faso | Reformed Evangelical Church of Burkina Faso |
| Cameroon | Presbyterian Church in Cameroon |
| Cameroon | Presbyterian Church of Cameroon |
| Cameroon | African Protestant Church |
| Cameroon | Evangelical Church of Cameroon |
| Canada | The Presbyterian Church in Canada / L'Eglise presbytérienne au Canada |
| Canada | United Church of Canada |
| Central African Republic | Protestant Church of Christ the King |
| Chile | Presbyterian Evangelical Church in Chile |
| Chile | Presbyterian Church of Chile |
| China / Hong Kong | The Hong Kong Council of the Church of Christ in China |
| China / Peoples Republik of | China Christian Council |
| Colombia | Presbyterian Church of Colombia |
| Congo, Democratic Republic | Presbyterian Community in Congo |
| Congo, Democratic Republic | Presbyterian Community of Eastern Kasai |
| Congo, Democratic Republic | Reformed Community of Presbyterians |
| Congo, Democratic Republic | Presbyterian Community of Western Kasai? /
Reformed Presbyterian Community in Africa |
| Congo, Democratic Republic | Presbyterian Community of Kinshasa |
| Congo, Democratic Republic | Evangelical Community in Congo |
| Congo, Democratic Republic | Protestant Community of Shaba |
| Congo, Republic | Evangelical Church of Congo |
| Costa Rica | Costarrican Evangelical Presbyterian Church |
| Croatia | Reformed Christian Church in Croatia |
| Cuba | Presbyterian Reformed Church in Cuba |
| Czech Republic | Evangelical Church of Czech Brethren / Evangelische Kirche der Böhmischen Brüder |
| Denmark | Reformed Synod of Denmark |
| Dominican Republic | Dominican Evangelical Church |
| East Timor | Christian Church in East Timor
Gereja Kristen di Timor Timur |
| Egypt | Evangelical Church of Egypt - Synod of the Nile |
| El Salvador | Reformed Calvinist Church of El Salvador |
| Equatorial Guinea | Reformed Presbyterian Church of Equatorial Guinea |
| Ethiopia | Ethiopian Evangelical Church Mekane Yesus |
| France | Reformed Church of France |
| France | Reformed Church of Alsace and Lorraine |
| France | Malagazy Protestant Church in France |
| French Polynesia | Maòhi Protestant Church |
| Germany | Church of Lippe |
| Germany | Evangelical Reformed Church |
| Germany | Reformed Alliance |
| Ghana | Presbyterian Church of Ghana |
| Ghana | Evangelical Presbyterian Church, Ghana |
| Greece | Greek Evangelical Church |
| Grenada | Presbyterian Church in Grenada |
| Guatemala | National Evangelical Presbyterian Church of Guatemala |
| Guyana | Presbytery of Guyana |
| Guyana | Guyana Congregational Union |
| Guyana | Guyana Presbyterian Church |
| Honduras | Christian Reformed Church of Honduras |
| Hungary | Reformed Church in Hungary |
| India | Reformed Presbyterian Church, North East India |
| India | Church of South India |
| India | Church of North India |
| India | Presbyterian Church of India |
| India | Lairam Church of Jesus Christ |
| India | The Congregational Church of India (Maraland) |
| India | Evangelical Church of Maraland |
| Indonesia | Protestant Church in the Moluccas |
| Indonesia | Pasundan Christian Church |
| Indonesia | The Christian Evangelical Church in Halmahera |
| Indonesia | Protestant Church in Southeast Sulawesi |
| Indonesia | Karo Batak Protestant Church |
| Indonesia | Protestant Christian Church in Bali |
| Indonesia | Christian Evangelical Church in Minahasa |
| Indonesia | Toraja Church |
| Indonesia | Evangelical Church in Kalimantan |
| Indonesia | Christian Church in South Sulawesi |
| Indonesia | Christian Evangelical Church in Sangihe-Talaud |
| Indonesia | Toraja Mamasa Church |
| Indonesia | Indonesian Christian Church |
| Indonesia | Christian Church in Central Sulawesi |
| Indonesia | Christian Evangelical Church in Timor |
| Indonesia | Protestant Church in West Indonesia |
| Indonesia | Evangelical Christian Church in West Papua |
| Indonesia | Christian Church of Southern Sumatra |
| Indonesia | Indonesian Protestant Church in Buol Toli-Toli |
| Indonesia | Christian Churches of Java |
| Indonesia | Christian Church of Sumba |
| Indonesia | Indonesian Protestant Church in Donggala |
| Indonesia | The East Java Christian Church |
| Indonesia | Indonesian Protestant Church in Gorontalo |
| Indonesia | Christian Church in Luwuk Banggai |
| Indonesia | Christian Evangelical Church in Bolaang Mongondow |
| Iran | Synod of the Evangelical Church of Iran |
| Israel | St. Andrew's Scots Memorial Church |
| Italy | Waldensian Evangelical Church (Union of Waldensian and Methodist Churches) |
| Jamaica | The United Church in Jamaica and the Cayman Islands |
| Japan | Church of Christ in Japan |
| Japan | Korean Christian Church in Japan |
| Kenya | Presbyterian Church of East Africa |
| Kenya | Reformed Church of East Africa |
| Kiribati | Kiribati Protestant Church |
| Korea, Republic of | KiJang |
| Korea, Republic of | TongHap |
| Korea, Republic of | DaeShin I |
| Korea, Republic of | HapDongJeongTong (Hap Dong Chung Tong) |
| Latvia | Reformed Church in Latvia |
| Lebanon | Union of the Armenian Evangelical Churches in the Near East |
| Lebanon | The National Evangelical Union of Lebanon |
| Lebanon | National Evangelical Synod of Syria and Lebanon |
| Lesotho | Lesotho Evangelical Church |
| Liberia | Presbyterian Church of Liberia |
| Lithuania | Synod of the Evangelical Reformed Church - Unitas Lithuaniae |
| Luxembourg | Protestant Reformed Church of Luxemburg H.B. |
| Madagascar | Church of Jesus Christ in Madagascar
Eglise de Jésus-Christ à Madagascar |
| Malawi | General Synod |
| Malaysia | Presbyterian Church in Malaysia |
| Marshall Island | United Church of Christ-Congregational in the Marshall Islands |
| Marshall Island | Reformed Congregational Churches |
| Mauritius | Presbyterian Church of Mauritius |
| Mexico | National Presbyterian Church in Mexico, A. R. |
| Mexico | Associate Reformed Presbyterian Church of Mexico |
| Mexico | Presbyterian Reformed Church of Mexico |
| Morocco | Evangelical Church in Morocco |
| Mozambique | Evangelical Church of Christ in Mozambique |
| Mozambique | Presbyterian Church of Mozambique |
| Mozambique | United Church of Christ in Mozambique |
| Myanmar | Mara Evangelical Church |
| Myanmar | Independent Presbyterian Church of Myanmar |
| Myanmar | The Presbyterian Church of Myanmar |
| Netherlands | (former: Nederlandse Hervormde Kerk)
The Protestant Church in the Netherlands |
| Netherlands | Remonstrant Brotherhood |
| Netherlands | (former: Gereformeerde Kerken in Nederland)
The Protestant Church in the Netherlands |
| New Caledonia | Evangelical Church in New Caledonia and Loyalty Islands |
| New Zealand | Presbyterian Church of Aotearoa New Zealand |
| Niger | Evangelical Church of the Republic of Niger
Eglise évangélique de la République du Niger |
| Nigeria | Christian Reformed Church of Nigeria |
| Nigeria | Church of Christ in the Sudan among the TIV |
| Nigeria | Evangelical Reformed Church of Christ |
| Nigeria | Reformed Church of Christ in Nigeria |
| Nigeria | United Church of Christ in Nigeria |
| Nigeria | Presbyterian Church of Nigeria |
| Niue | Church of Niue |
| Pakistan | Presbyterian Church of Pakistan |
| Pakistan | Sialkot Diocese of the Church of Pakistan |
| Philippines | United Church of Christ in the Philippines |
| Philippines | United Evangelical Church of Christ |
| Poland | Evangelical Reformed Church in Poland |
| Portugal | Evangelical Presbyterian Church of Portugal |
| Reunion | Protestant Church of Reunion Island |
| Romania | Reformed Church in Romania - Transylvanian District |
| Romania | Reformed Church in Romania (Oradea) |
| Rwanda | Presbyterian Church in Rwanda |
| Senegal | Protestant Church of Senegal |
| Serbia and Montenegro | Reformed Christian Church in Serbia and Montenegro |
| Singapore | Presbyterian Church in Singapore |
| Slovakia | Reformed Christian Church in Slovakia |
| Slovenia | Reformed Church in Slovenia |
| Solomon Islands | United Church in the Solomon Islands |
| South Africa | Uniting Reformed Church in Southern Africa |
| South Africa | Reformed Church in Africa, South Africa |
| South Africa | Evangelical Presbyterian Church in South Africa |
| South Africa | Presbyterian Church of Africa |
| South Africa | Uniting Presbyterian Church in Southern Africa |
| South Africa | United Congregational Church of Southern Africa |
| South Africa | Peoples Church of Africa |
| South Africa | Dutch Reformed Church |
| Spain | Spanish Evangelical Church |
| Sri Lanka | Dutch Reformed Church in Sri Lanka (Ceylon) |
| Sri Lanka | Presbytery of Lanka |
| Sudan | Africa Inland Church Sudan |
| Sweden | The Mission Covenant Church of Sweden |
| Switzerland | Federation of Swiss Protestant Churches, Fédération des Eglises protestantes de
Suisse, Federazione delle Chiese evangeliche della Svizzera |
| Taiwan (China, Republic of) | Presbyterian Church in Taiwan |
| Thailand | Church of Christ in Thailand |
| Togo | Evangelical Presbyterian Church of Togo |
| Trinidad and Tobago | Presbyterian Church in Trinidad and Tobago |
| Tunisia | Reformed Church in Tunisia |
| Tuvalu | Tuvalu Christian Church |
| Uganda | Reformed Presbyterian Church in Uganda |
| Ukraine | Reformed Church in Sub-Carpathia/
Reformed Church in Transcarpathia |
| United Kingdom of Great Britain and Northern Ireland | Church of Scotland |
| United Kingdom of Great Britain and Northern Ireland | Presbyterian Church of Wales |
| United Kingdom of Great Britain and Northern Ireland | Union of Welsh Independents |
| United Kingdom of Great Britain and Northern Ireland | United Free Church of Scotland |
| United Kingdom of Great Britain and Northern Ireland | United Reformed Church |
| United Kingdom of Great Britain and Northern Ireland | The Presbyterian Church in Ireland |
| United States of America | Lithuanian Evangelical Reformed Church |
| United States of America | Presbyterian Church (USA) |
| United States of America | Christian Reformed Church in North America |
| United States of America | Cumberland Presbyterian Church |
| United States of America | Cumberland Presbyterian Church in America |
| United States of America | Reformed Church in America |
| United States of America | Evangelical Presbyterian Church |
| United States of America | Hungarian Reformed Church in America |
| United States of America | United Church of Christ |
| United States of America | Korean Presbyterian Church in America |
| Uruguay | Waldensian Evangelical Church of the River Plate |
| Vanuatu | Presbyterian Church of Vanuatu |
| Venezuela | Presbyterian Church of Venezuela |
| Western Samoa | Congregational Christian Church in Samoa |
| Zambia | United Church of Zambia |
| Zambia | Reformed Church in Zambia |
| Zimbabwe | Reformed Church in Zimbabwe |
| Zimbabwe | Presbyterian Church of Southern Africa |
