| Unknown |
Diocese of Arba was established |
| 300 |
Diocese of Poreč was established |
| 300 |
Diocese of Ragusa was established |
| 300 |
Diocese of Salona was established |
| 300 |
Diocese of Sisak was established |
| 300 |
Diocese of Vinkovci was established |
| 380 |
Diocese of Zadar was established |
| 400 |
Diocese of Senj was established |
| 500 |
Diocese of Salona was promoted as Metropolitan Archdiocese of Salona (with suffragan sees Ragusa and Zadar) |
| 500 |
Diocese of Vinkovci was suppressed |
| 520 |
Diocese of Cittanova was established (from the suppressed Diocese of Emona and became suffragan of Aquileia) |
| 530 |
Diocese of Narona was established |
| 533 |
Diocese of Makarska was established (from Diocese of Narona) |
| 557 |
Diocese of Pedena was established (from Diocese of Trieste) |
| 590 |
Diocese of Makarska was suppressed (to Metropolitan Archdiocese of Salona and to establish Diocese of Duvno) |
| 600 |
Diocese of Narona was suppressed (to Diocese of Ragusa) |
| 600 |
Diocese of Osor was established |
| 600 |
Diocese of Pula was established (became suffragan of Ravenna) |
| 650 |
Metropolitan Archdiocese of Salona was renamed as Metropolitan Archdiocese of Split |
| 700 |
Diocese of Sisak was suppressed |
| 800 |
Diocese of Ston was established (from Diocese of Ragusa) |
| 811 |
Diocese of Cittanova lost territory to Patriarchal See of Aquileia |
| 850 |
Diocese of Nona was established |
| 900 |
Diocese of Krk was established (became suffragan of Split) |
| 929 |
Diocese of Nona was suppressed (to Diocese of Zadar) |
| 1050 |
Diocese of Knin was established (became suffragan of Split) |
| 1050 |
Diocese of Nona was restored (from Diocese of Zadar) |
| 1050 |
Diocese of Traù was established (became suffragan of Split) |
| 1059 |
Diocese of Alba maritima was established |
| 1093 |
Diocese of Zagreb was established (from former Diocese of Sisak and became suffragan of Esztergom) |
| 1120 |
Diocese of Ragusa was promoted as Metropolitan Archdiocese of Ragusa (with suffragan see Bosnia) |
| 1126 |
Diocese of Alba maritima was suppressed (to establish Diocese of Skradin) |
| 1126 |
Diocese of Skradin was established (from the suppressed Diocese of Alba maritima) |
| 1144 |
Diocese of Hvar was established (from Metropolitan Archdiocese of Split) |
| 1154.10.17 |
Diocese of Zadar was promoted as Metropolitan Archdiocese of Zadar (with suffragan sees Hvar and Krk) |
| 1185 |
Diocese of Corbavia was established |
| 1250 |
Diocese of Bosnia was established (from Diocese of Pécs, from the suppressed Diocese of Bosnia and became suffragan of Ragusa) |
| 1298.05.01 |
Diocese of Šibenik was established (from Diocese of Traù and became suffragan of Split) |
| 1300 |
Diocese of Korcula was established (from Diocese of Hvar and from the suppressed Diocese of Ston) |
| 1300 |
Diocese of Ston was suppressed (to establish Diocese of Korcula) |
| 1344 |
Diocese of Makarska was restored (from Metropolitan Archdiocese of Split) |
| 1400 |
Diocese of Makarska was suppressed (to Metropolitan Archdiocese of Split) |
| 1460 |
Diocese of Corbavia was suppressed (to establish Diocese of Modruš) |
| 1460 |
Diocese of Modruš was established (from the suppressed Diocese of Corbavia) |
| 1460 |
Diocese of Otočac was established (from Diocese of Senj) |
| 1534 |
Diocese of Otočac was suppressed (to Diocese of Senj) |
| 1541 |
Diocese of Ston was restored (from Diocese of Korcula) |
| 1611.11.21 |
Apostolic Vicariate of Marča (Croatian Rite) was established (from Diocese of Zagreb) |
| 1615 |
Diocese of Makarska was restored (from Metropolitan Archdiocese of Split) |
| 1630 |
Diocese of Modruš was suppressed (to Diocese of Senj–Modruš) |
| 1630 |
Diocese of Senj was renamed as Diocese of Senj–Modruš (gained territory from the suppressed Diocese of Modruš) |
| 1773.07.09 |
Diocese of Bosnia was renamed as Diocese of Bosnia i Srijem (gained territory from the suppressed Diocese of Srijem) |
| 1777.06.17 |
Apostolic Vicariate of Marča (Croatian Rite) was promoted as Diocese of Gornji Tkalec (became suffragan of Esztergom) |
| 1784 |
Diocese of Poreč exchanged territory with Diocese of Trieste |
| 1787.10.16 |
Diocese of Pula lost territory to Diocese of Senj–Modruš |
| 1788.03.08 |
Diocese of Pedena was suppressed (to establish Diocese of Gradisca) |
| 1794 |
Diocese of Pula lost territory to Diocese of Trieste |
| 1801 |
Diocese of Gornji Tkalec (Croatian Rite) was renamed as Diocese of Križevci |
| 1828.06.30 |
Diocese of Arba was suppressed (to Diocese of Krk) |
| 1828.06.30 |
Metropolitan Archdiocese of Ragusa was demoted as Diocese of Dubrovnik (gained territory from the suppressed Diocese of Korcula and Diocese of Ston and became suffragan of Zadar) |
| 1828.06.30 |
Diocese of Knin was suppressed (to Diocese of Šibenik) |
| 1828.06.30 |
Diocese of Korcula was suppressed (to Diocese of Dubrovnik) |
| 1828.06.30 |
Diocese of Nona was suppressed (to Metropolitan Archdiocese of Zadar) |
| 1828.06.30 |
Diocese of Osor was suppressed (to Diocese of Krk) |
| 1828.06.30 |
Diocese of Poreč was renamed as Diocese of Poreč i Pula (gained territory from the suppressed Diocese of Pula) |
| 1828.06.30 |
Diocese of Pula was suppressed (to Diocese of Poreč i Pula) |
| 1828.06.30 |
Diocese of Skradin was suppressed (to Diocese of Šibenik) |
| 1828.06.30 |
Metropolitan Archdiocese of Split was demoted as Diocese of Split (gained territory from the suppressed Diocese of Traù, lost territory to Diocese of Šibenik and became suffragan of Zadar) |
| 1828.06.30 |
Diocese of Ston was suppressed (to Diocese of Dubrovnik) |
| 1828.06.30 |
Diocese of Traù was suppressed (to Diocese of Šibenik and Diocese of Split) |
| 1831.05.23 |
Diocese of Cittanova was suppressed (to Diocese of Trieste) |
| 1852.12.11 |
Diocese of Zagreb was promoted as Metropolitan Archdiocese of Zagreb (with suffragan see Križevci) |
| 1889.01.14 |
Diocese of Hvar was renamed as Diocese of Hvar–Brač–Vis |
| 1920.04.30 |
Apostolic Administration of Rijeka was established (from Diocese of Senj–Modruš) |
| 1920.11.12 |
Diocese of Krk lost territory to Apostolic Administration of Rijeka |
| 1925 |
Titular Episcopal See of Knin was renamed as Titular Episcopal See of Tinum |
| 1925.04.25 |
Apostolic Administration of Rijeka was promoted as Diocese of Rijeka–Opatija (gained territory from Diocese of Ljubljana, Diocese of Senj–Modruš and Diocese of Trieste and without ecclesiastical province) |
| 1925.04.25 |
Diocese of Senj–Modruš lost territory to Diocese of Rijeka–Opatija |
| 1932.08.01 |
Diocese of Rijeka–Opatija lost territory to Archdiocese of Zadar |
| 1932.08.01 |
Metropolitan Archdiocese of Zadar was demoted as Archdiocese of Zadar (gained territory from Diocese of Rijeka–Opatija, lost territory to Diocese of Šibenik and without ecclesiastical province) |
| 1933 |
Titular Episcopal See of Arba was restored |
| 1933 |
Titular Episcopal See of Tinum was renamed as Titular Episcopal See of Knin |
| 1933 |
Titular Episcopal See of Korčula was restored |
| 1933 |
Titular Episcopal See of Narona was restored |
| 1933 |
Titular Episcopal See of Nin was restored |
| 1933 |
Titular Episcopal See of Osor was restored |
| 1933 |
Titular Episcopal See of Otočac was restored |
| 1933 |
Titular Episcopal See of Skradin was restored |
| 1933 |
Titular Episcopal See of Ston was restored |
| 1933 |
Titular Episcopal See of Trogir was restored |
| 1948.03.01 |
Diocese of Šibenik lost territory to Archdiocese of Zadar |
| 1948.04.09 |
Titular Episcopal See of Alba marittima was restored (from the suppressed former Titular Episcopal See of Belogradum) |
| 1963.01.06 |
Diocese of Rijeka–Opatija lost territory to Diocese of Krk |
| 1963.01.06 |
Archdiocese of Zadar lost territory to Diocese of Krk |
| 1963.11.18 |
Diocese of Bosnia i Srijem was renamed as Diocese of Đakovo i Srijem |
| 1969 |
Titular Episcopal See of Novigrad was restored |
| 1969 |
Titular Episcopal See of Pićan was restored |
| 1969.07.27 |
Diocese of Makarska was suppressed (to Metropolitan Archdiocese of Split–Makarska) |
| 1969.07.27 |
Diocese of Rijeka–Opatija was promoted as Metropolitan Archdiocese of Rijeka–Senj (with suffragan sees Krk and Poreč i Pula and gained territory from the suppressed Diocese of Senj–Modruš) |
| 1969.07.27 |
Diocese of Senj–Modruš was suppressed (to Metropolitan Archdiocese of Rijeka–Senj) |
| 1969.07.27 |
Diocese of Split was promoted as Metropolitan Archdiocese of Split–Makarska (with suffragan sees Dubrovnik, Hvar–Brač–Vis, Kotor and Šibenik and gained territory from the suppressed Diocese of Makarska) |
| 1970 |
Titular Episcopal See of Cissa was established |
| 1977.10.17 |
Diocese of Poreč i Pula exchanged territory with Diocese of Koper |
| 1977.10.17 |
Metropolitan Archdiocese of Rijeka–Senj lost territory to Diocese of Koper |
| 1997.04.25 |
Military Ordinariate of Vojni ordinarijat u Republici Hrvatskoj was established |
| 1997.07.05 |
Diocese of Požega was established (from Metropolitan Archdiocese of Zagreb and became suffragan of Zagreb) |
| 1997.07.05 |
Diocese of Varaždin was established (from Metropolitan Archdiocese of Zagreb and became suffragan of Zagreb) |
| 1999 |
Titular Episcopal See of Sisak was restored |
| 2000 |
Titular Episcopal See of Krbava was restored |
| 2000 |
Titular Episcopal See of Modruš was restored |
| 2000.05.25 |
Diocese of Gospić–Senj was established (from Metropolitan Archdiocese of Rijeka–Senj and became suffragan of Rijeka) |
| 2000.05.25 |
Metropolitan Archdiocese of Rijeka–Senj was renamed as Metropolitan Archdiocese of Rijeka (lost territory to establish Diocese of Gospić–Senj and gained suffragan see Gospić–Senj) |
| 2008.06.18 |
Diocese of Đakovo i Srijem was promoted as Metropolitan Archdiocese of Đakovo–Osijek (with suffragan sees Požega and Srijem and lost territory to establish Diocese of Srijem) |
| 2009.11 |
Titular Episcopal See of Vinkovci was restored |
| 2009.12.05 |
Diocese of Bjelovar–Križevci was established (from Metropolitan Archdiocese of Zagreb and became suffragan of Zagreb) |
| 2009.12.05 |
Diocese of Sisak was restored (from Metropolitan Archdiocese of Zagreb and became suffragan of Zagreb) |
