The Church of Iceland, officially the Evangelical Lutheran Church of Iceland, is the national church of Iceland. The church is Christian and professes the Lutheran faith. It is a member of the Lutheran World Federation, the Porvoo Communion, the Communion of Protestant Churches in Europe, and the World Council of Churches.

The Lutheran World Federation is a global communion of national and regional Lutheran denominations headquartered in the Ecumenical Centre in Geneva, Switzerland. The federation was founded in the Swedish city of Lund in the aftermath of the Second World War in 1947 to coordinate the activities of the many differing Lutheran churches. Since 1984, the member churches are in pulpit and altar fellowship, with common doctrine as the basis of membership and mission activity.