Bishop(s)
  | 
General Information
  | 
| Date | Event | From | To | 
|---|---|---|---|
| Diocese of Tongres (Tongeren) | |||
| 344 | Erected | Diocese of Köln | Diocese of Tongres (Tongeren) (erected) | 
| Diocese of Maastricht | |||
| 384 | Name Changed | Diocese of Tongres (Tongeren) | Diocese of Maastricht | 
| Diocese of Liège | |||
| 720 | Name Changed | Diocese of Maastricht | Diocese of Liège | 
| 12 May 1559 | Territory Lost | Diocese of Cambrai
 Diocese of Liège  | Archdiocese of Mechelen (erected) | 
| 12 May 1559 | Territory Lost | Diocese of Liège | Diocese of Namur {Namen} (erected)
 Diocese of ’s-Hertogenbosch (Bois-le-Duc) (erected)  | 
| 12 May 1559 | Territory Lost | Diocese of Cambrai
 Diocese of Liège  | Diocese of Antwerpen {Antwerp, Anvers} (erected) | 
| 12 May 1559 | Territory Lost | Archdiocese of Köln {Cologne}
 Diocese of Liège  | Diocese of Roermond (erected) | 
| 29 November 1801 | Territory Lost | Archdiocese of Köln {Cologne}
 Diocese of Liège  | Diocese of Aachen (erected) | 
| 1840 | Territory Lost | Diocese of Liège | Vicariate Apostolic of Limburg (erected) | 
| Diocese of Liège, Eupen et Malmédy | |||
| 30 July 1921 | Name Changed | Archdiocese of Köln {Cologne} (Eupen and Malmédy)
 Diocese of Liège  | Diocese of Liège, Eupen et Malmédy | 
| Diocese of Liège (Luik, Lüttich) | |||
| 16 November 1925 | Name Changed | Diocese of Liège, Eupen et Malmédy | Diocese of Liège (Luik, Lüttich) | 
| 31 May 1967 | Territory Lost | Diocese of Liège (Luik, Lüttich) (Limbourg) | Diocese of Hasselt (erected) | 
| 30 November 1977 | Territory Lost | Diocese of Liège (Luik, Lüttich) (St. Remigius in Landenne, B. M. V. Auxiliatrix in Petit-Wäret, St. Stephen in Seilles and SS. Peter and Paul in Povedroux)
 Archdiocese of Mechelen-Brussel {Malines-Brussels} (S. Philibert in Noville-sur-Mehaigne) Diocese of Tournai {Doornik} (St. Lambert in Boignée)  | Diocese of Namur {Namen} | 
| 30 November 1977 | Territory Added | Diocese of Namur {Namen} (S. Maurice in Arbrefontaine, B. M. V. Assumptae in My and the Chapel of S. Stephen in Ville) | Diocese of Liège (Luik, Lüttich) | 
| Year | Catholics | Total Population | Percent Catholic | Diocesan Priests | Religious Priests | Total Priests | Catholics Per Priest | Permanent Deacons | Male Religious | Female Religious | Parishes | Source | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Diocese of Liège (Luik, Lüttich) | ||||||||||||
| 1950 | 1,300,000 | 1,424,297 | 91.3% | 1,810 | 710 | 2,520 | 515 | 1,400 | 5,500 | 778 | ap1951 | |
| 1970 | 900,000 | 1,016,131 | 88.6% | 980 | 318 | 1,298 | 693 | 2 | 461 | 515 | ap1971 | |
| 1980 | 800,000 | 1,007,490 | 79.4% | 787 | 223 | 1,010 | 792 | 31 | 304 | 1,819 | 518 | ap1981 | 
| 1990 | 780,000 | 993,060 | 78.5% | 659 | 189 | 848 | 919 | 66 | 256 | 1,239 | 523 | ap1991 | 
| 1999 | 700,000 | 1,017,805 | 68.8% | 480 | 209 | 689 | 1,015 | 72 | 276 | 801 | 505 | ap2000 | 
| 2000 | 700,000 | 1,016,762 | 68.8% | 465 | 185 | 650 | 1,076 | 74 | 247 | 762 | 525 | ap2001 | 
| 2001 | 700,000 | 1,020,077 | 68.6% | 445 | 184 | 629 | 1,112 | 75 | 247 | 743 | 525 | ap2002 | 
| 2002 | 700,000 | 1,023,506 | 68.4% | 440 | 184 | 624 | 1,121 | 74 | 250 | 743 | 525 | ap2003 | 
| 2003 | 700,000 | 1,023,506 | 68.4% | 421 | 122 | 543 | 1,289 | 76 | 175 | 609 | 525 | ap2004 | 
| 2004 | 700,000 | 1,023,506 | 68.4% | 402 | 122 | 524 | 1,335 | 74 | 168 | 579 | 525 | ap2005 | 
| 2013 | 721,000 | 1,054,000 | 68.4% | 285 | 100 | 385 | 1,872 | 69 | 140 | 443 | 525 | ap2014 | 
| 2016 | 731,000 | 1,092,226 | 66.9% | 301 | 61 | 362 | 2,019 | 71 | 130 | 452 | 525 | ap2017 | 
| 2019 | 731,600 | 1,093,377 | 66.9% | 324 | 57 | 381 | 1,920 | 66 | 290 | 114 | 552 | ap2020 | 
| 2021 | 735,000 | 1,098,450 | 66.9% | 277 | 71 | 348 | 2,112 | 59 | 93 | 226 | 551 | ap2022 | 
| 2023 | 741,625 | 1,108,400 | 66.9% | 242 | 77 | 319 | 2,324 | 58 | 95 | 216 | 545 | ap2024 | 
Note: Any changes in boundaries over time are not indicated in the above table.
 
 
 
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