(Click on the column title to sort by that column)
| # | Catholics | Population | Percent Catholic | Diocese | Year | Source |
|---|---|---|---|---|---|---|
| 1 | 529,399 | 623,944 | 84.85% | Alajuela | 2004 | ap2005 |
| 2 | 272,388 | 378,523 | 71.96% | Cartago | 2005 | bul:24May05 |
| 3 | 204,722 | 240,850 | 85.00% | Ciudad Quesada | 2004 | ap2005 |
| 4 | 348,591 | 446,912 | 78.00% | Limón | 2004 | ap2005 |
| 5 | 168,274 | 183,000 | 91.95% | Puntarenas | 2004 | ap2005 |
| 6 | 303,193 | 338,396 | 89.60% | San Isidro de El General | 2004 | ap2005 |
| 7 | 1,621,800 | 1,930,714 | 84.00% | San José de Costa Rica (Archdiocese) | 2004 | ap2005 |
| 8 | 318,750 | 375,000 | 85.00% | Tilarán | 2004 | ap2005 |
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