The Diocese of Argyll and The Isles is in the west of Scotland, and is one of the seven dioceses of the Scottish Episcopal Church. It is perhaps the largest of the dioceses, but has the smallest number of church members. As a united diocese, Argyll and The Isles has two cathedrals: St John's in Oban and the Cathedral of The Isles in Millport, Isle of Cumbrae. The Diocese of Argyll and The Isles is twinned with the Anglican Diocese of Zanzibar (Anglican Church of Tanzania) and the Episcopal Diocese of Delaware (Episcopal Church in the United States of America).