(Click on the column title to sort by that column)
| # | Catholics | Population | Percent Catholic | Diocese | Year | Source |
|---|---|---|---|---|---|---|
| 1 | 250,000 | 1,145,000 | 21.83% | Debrecen-Nyíregyháza | 2004 | ap2005 |
| 2 | 690,000 | 1,260,000 | 54.76% | Eger (Archdiocese) | 2004 | ap2005 |
| 3 | 1,258,000 | 2,094,000 | 60.08% | Esztergom-Budapest (Archdiocese) | 2004 | ap2005 |
| 4 | 365,000 | 530,000 | 68.87% | Győr | 2004 | ap2005 |
| 5 | 248,987 | Hajdúdorog (Byzantine) | 2004 | ap2005 | ||
| 6 | Hungary, Military (Military Ordinariate) | 2004 | ap2005 | |||
| 7 | 379,072 | 546,345 | 69.38% | Kalocsa-Kecskemét (Archdiocese) | 2004 | ap2005 |
| 8 | 301,523 | 416,373 | 72.42% | Kaposvár | 2004 | ap2005 |
| 9 | 19,948 | Miskolc (Byzantine) (Apostolic Exarchate) | 2004 | ap2005 | ||
| 10 | 21,516 | 24,780 | 86.83% | Pannonhalma (Territorial Abbey) | 2004 | ap2005 |
| 11 | 401,000 | 621,000 | 64.57% | Pécs | 2004 | ap2005 |
| 12 | 440,000 | 936,000 | 47.01% | Szeged-Csanád | 2004 | ap2005 |
| 13 | 435,700 | 858,700 | 50.74% | Székesfehérvár | 2004 | ap2005 |
| 14 | 294,000 | 378,000 | 77.78% | Szombathely | 2004 | ap2005 |
| 15 | 640,000 | 1,116,000 | 57.35% | Vác | 2004 | ap2005 |
| 16 | 315,374 | 478,029 | 65.97% | Veszprém (Archdiocese) | 2004 | ap2005 |
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