(Click on the column title to sort by that column)
| # | Catholics | Population | Percent Catholic | Diocese | Year | Source |
|---|---|---|---|---|---|---|
| 1 | 403,104 | 473,104 | 85.20% | Nebbi | 2004 | ap2005 |
| 2 | 887,000 | 1,373,000 | 64.60% | Soroti | 2004 | ap2005 |
| 3 | 908,220 | 1,513,700 | 60.00% | Masaka | 2004 | ap2005 |
| 4 | 622,913 | 1,079,654 | 57.70% | Gulu (Archdiocese) | 2004 | ap2005 |
| 5 | 980,600 | 1,751,700 | 55.98% | Lira | 2004 | ap2005 |
| 6 | 200,293 | 370,000 | 54.13% | Moroto | 2004 | ap2005 |
| 7 | 658,900 | 1,332,900 | 49.43% | Hoima | 2004 | ap2005 |
| 8 | 654,129 | 1,394,984 | 46.89% | Fort Portal | 2004 | ap2005 |
| 9 | 130,150 | 283,640 | 45.89% | Kotido | 2004 | ap2005 |
| 10 | 693,530 | 1,541,176 | 45.00% | Kabale | 2004 | ap2005 |
| 11 | 201,248 | 466,995 | 43.09% | Kasese | 2004 | ap2005 |
| 12 | 471,500 | 1,150,000 | 41.00% | Lugazi | 2004 | ap2005 |
| 13 | 337,963 | 829,488 | 40.74% | Kiyinda-Mityana | 2004 | ap2005 |
| 14 | 610,050 | 1,560,890 | 39.08% | Arua | 2004 | ap2005 |
| 15 | 901,384 | 2,426,448 | 37.15% | Mbarara (Archdiocese) | 2004 | ap2005 |
| 16 | 1,198,206 | 3,274,486 | 36.59% | Kampala (Archdiocese) | 2004 | ap2005 |
| 17 | 198,519 | 593,627 | 33.44% | Kasana-Luweero | 2004 | ap2005 |
| 18 | 618,199 | 2,630,974 | 23.50% | Jinja | 2004 | ap2005 |
| 19 | 550,000 | 2,500,000 | 22.00% | Tororo (Archdiocese) | 2004 | ap2005 |
|