Diocese of Georgetown, Guyana, South America is the official nomenclature of the Catholic diocese of Guyana. The Diocese of Guyana is referred to the Anglican Diocese. Among the Christian denominations active in Guyana in the 1990s, the Anglican Church claimed the largest membership; about 125,000 adherents as of 1986. Anglicanism was the state religion of British Guiana until independence. The Roman Catholic Church had a membership of about 94,000 in 1985. The majority of Roman Catholics lived in Georgetown, and the Portuguese were the most active members, although all the ethnic groups were represented. The Presbyterian Church was the third largest denomination, with nearly 39,000 members in 1980.