Episcopal Diocese of Quincy

The Episcopal Diocese of Quincy is a diocese of the Episcopal Church in western Illinois. It was established in 1877. The Episcopal Church is part of the worldwide Anglican Communion. The cathedral seat (home of the Diocese) was originally in Quincy but was moved to St. Paul's Cathedral in Peoria in 1963. In order to avoid confusion with the Roman Catholic Diocese of Peoria, the diocese retained the name of the location of its original "home" city, Quincy, where its cathedral seat was St. John's.

In November 2008, a majority of the diocesan synod (or diocesan convention) voted to leave The Episcopal Church and associate with Anglican Province of the Southern Cone, part of a denomination also a member of the worldwide Anglican Communion, as part of the conservative Anglican realignment movement. Those parishes and parishioners who did not vote to leave The Episcopal Church remain and continue as the (Episcopal) Diocese of Quincy. This included the Cathedral parish of St. Paul in Peoria, the largest parish in the diocese. Those who left the Episcopal Church formed the Southern Cone Diocese of Quincy.

An Executive Committee was elected at the Cathedral on December 13, 2008 to carry out the business of the Committee to Reorganize the Diocese of Quincy, in communion with the Episcopal Church, particularly to organize a Special Synod of the Diocese of Quincy to elect a Standing Committee and other officials of the Diocese. The Rt. Rev. Keith Whitmore, assistant bishop of the Diocese of Atlanta, retired bishop of the Diocese of Eau Claire, Wisconsin, served the Diocese of Quincy, as consulting Bishop, until a Special Synod, held at the Cathedral on April 4, 2009. The synod elected the Rt. Rev. John Clark Buchanan, retired Bishop of West Missouri, as provisional Bishop.