It is based on the traditional County Antrim, including those parts of Belfast west of the River Lagan, and a small part of County Londonderry including Portstewart and those parts of Coleraine east of the River Bann.

Based on Census figures, more than 100,000 self-described adherents of the Church of Ireland live in the Diocese, making it home to the largest Anglican population of any Irish diocese and more than one in four members of the Church of Ireland.
 It is unusual in being the only Church of Ireland diocese where Presbyteriansm, rather than Roman Catholicism is the religious denomination of a plurality of the population.
It is based on the traditional County Antrim, including those parts of Belfast west of the River Lagan, and a small part of County Londonderry including Portstewart and those parts of Coleraine east of the River Bann.
Based on Census figures, more than 100,000 self-described adherents of the Church of Ireland live in the Diocese, making it home to the largest Anglican population of any Irish diocese and more than one in four members of the Church of Ireland.  It is unusual in being the only Church of Ireland diocese where Presbyteriansm, rather than Roman Catholicism is the religious denomination of a plurality of the population.
Diocese of Connor (Church of Ireland)