The World Council of Churches is formed by 147 churches from 44 countries.

The World Council of Churches (WCC) is a worldwide Christian inter-church organization founded in 1948 to work for the cause of ecumenism. Its full members today include the Assyrian Church of the East, most jurisdictions of the Eastern Orthodox Church, the Oriental Orthodox Churches, the Union of Utrecht, the Lutheran World Federation, the Anglican Communion, the Mennonite churches, the World Methodist Council, the Baptist World Alliance, the World Communion of Reformed Churches, several Pentecostal churches, the Moravian Church, and the Malankara Mar Thoma Syrian Church. Notably, the Catholic Church is not a full member, although it sends delegates who have observer status to meetings.