It is responsible for the suffragan dioceses of Rarotonga and Tarawa and Nauru and —as of 21 March 2003—the Mission Sui Iuris of Funafuti.

The Fiji Islands were included in the territory of the old Vicariate Apostolic of Central Oceania, created by Propaganda Fide in 1842.

The statistics for the vicariate showed in the early 20th century, for about 250 islands, of which some 90 are inhabited; its total land area is 7,435 square miles (19,260 km2), while the population in 1911 was 139,541 (3,707 Europeans; 87,096 autochthonous Fijians -of Melanesian (Papuan) stock, much crossed with Polynesian strains-; 4,286 Indians; the remainder of other eastern races): 30 priests (Marist Fathers), tending 18 central stations and 273 villages; 11 Little Brothers of Mary (Marist Brothers), in charge of a boarding and day school at Suva, a seminary and college at Cawaci and an English school for natives at Rewa; 24 European and 31 native Sisters of the Third Order of Mary (with 14 houses; novitiate at Solevu), conducting the majority of schools for girls; 8 sisters of St. Joseph of Cluny (2 houses), conducting the parochial school at Suva; 10 Sisters of the Holy Name of Mary (Marist Sisters), in charge of the school and orphanage at Levuka, a school at Ba, and assist the Marist brothers in the seminary and college at Cawaci; 12 native brothers (novitiate at Loretto) in 4 communities.

In the central stations the Marist brothers and sisters taught reading, writing etc., as well as religion, to 500 boys and 450 girls, while in the villages 315 catechists give elementary instruction to about 2000 children.

[4] Despite Archbishop Peter Loy Chong's statement that there had been no reported cases of clergy abusing children in Fiji, Australian priest Julian Fox, who was later convicted and jailed in 2015 for child sex crimes, had been transferred to Fiji in 1999 after Australian police started an investigation against him.