(Click on the column title to sort by that column)
| # | Catholics | Population | Percent Catholic | Diocese | Year | Source |
|---|---|---|---|---|---|---|
| 1 | 1,907,851 | 2,725,502 | 70.00% | San Salvador (Archdiocese) | 2004 | ap2005 |
| 2 | 940,000 | 1,115,000 | 84.30% | San Miguel | 2004 | ap2005 |
| 3 | 836,795 | 1,253,590 | 66.75% | Santa Ana | 2004 | ap2005 |
| 4 | 456,982 | 477,603 | 95.68% | San Vicente | 2004 | ap2005 |
| 5 | 400,000 | 500,000 | 80.00% | Santiago de Marķa | 2004 | ap2005 |
| 6 | 386,540 | 483,176 | 80.00% | Sonsonate | 2004 | ap2005 |
| 7 | 273,500 | 326,000 | 83.90% | Zacatecoluca | 2004 | ap2005 |
| 8 | 238,500 | 265,000 | 90.00% | Chalatenango | 2004 | ap2005 |
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