(Click on the column title to sort by that column)
| # | Catholics | Population | Percent Catholic | Diocese | Year | Source |
|---|---|---|---|---|---|---|
| 1 | 131,584 | 154,805 | 85.00% | Agaña (Archdiocese) | 2004 | ap2005 |
| 2 | 110,000 | 210,000 | 52.38% | Nouméa (Archdiocese) | 2004 | ap2005 |
| 3 | 89,000 | 236,693 | 37.60% | Papeete (Archdiocese) | 2004 | ap2005 |
| 4 | 87,090 | 959,424 | 9.08% | Suva (Archdiocese) | 2004 | ap2005 |
| 5 | 77,733 | 140,368 | 55.38% | Caroline Islands | 2003 | ap2004 |
| 6 | 48,908 | 92,494 | 52.88% | Tarawa and Nauru | 2004 | ap2005 |
| 7 | 43,000 | 71,850 | 59.85% | Chalan Kanoa | 2004 | ap2005 |
| 8 | 35,452 | 180,402 | 19.65% | Samoa-Apia (Archdiocese) | 2004 | ap2005 |
| 9 | 29,500 | 205,000 | 14.39% | Port-Vila | 2004 | ap2005 |
| 10 | 15,767 | 97,894 | 16.11% | Tonga | 2004 | ap2005 |
| 11 | 14,687 | 14,987 | 98.00% | Wallis et Futuna | 2004 | ap2005 |
| 12 | 12,000 | 60,000 | 20.00% | Samoa-Pago Pago | 2004 | ap2005 |
| 13 | 7,930 | 8,815 | 89.96% | Taiohae o Tefenuaenata | 2004 | ap2005 |
| 14 | 4,601 | 50,874 | 9.04% | Marshall Islands (Prefecture Apostolic) | 2004 | ap2005 |
| 15 | 2,519 | 14,990 | 16.80% | Rarotonga | 2004 | ap2005 |
| 16 | 500 | 1,650 | 30.30% | Tokelau (Mission "Sui Iuris") | 2004 | ap2005 |
| 17 | 122 | 9,564 | 1.28% | Funafuti (Mission "Sui Iuris") | 2004 | ap2005 |
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