The Metropolitan Archdiocese of Rijeka (Latin: Archidioecesis Metropolitae Fluminensis; Croatian: Riječka nadbiskupija i Metropolita) is a Latin Catholic Metropolitan archdiocese in Croatia.

Its episcopal seat is Rijeka Cathedral, dedicated to Saint Vitus (Croatian: Katedrala Sv. Vida), in the city of Rijeka. Other major churches include the former cathedral, dedicated to Saints Philip and James (Croatian: Crkva sv. Filipa i Jakova), located in nearby Novi Vinodolski, and a minor basilica, the Basilica of the Blessed Virgin (Croatian: Bazilika Blažene Djevice Marije), in the suburb of Trsat.

Its Suffragan bishoprics are :

• Roman Catholic Diocese of Gospić–Senj
• Roman Catholic Diocese of Krk
• Roman Catholic Diocese of Poreč i Pula

• Established on April 30, 1920 as Apostolic Administration of Rijeka, of territory split off from Diocese of Senj–Modruš
• Promoted on April 25, 1925 as Diocese of Rijeka–Opatija, having gained territories from Diocese of Ljubljana, again the Diocese of Senj–Modruš and Diocese of Trieste (Italy; which it gained additional territory from in 1934)
• Promoted on July 27, 1969 as Metropolitan Archdiocese of Rijeka–Senj, having gained once more territory from the above, newly suppressed Diocese of Senj–Modruš, adopting the front half of its title
• Lost territory on 1977.10.17 to Diocese of Koper (Slovenia)
• Renamed on May 25, 2000 as Metropolitan Archdiocese of Rijeka
• Enjoyed a Papal visit by Pope John Paul II in June 2003.

As per 2014, it pastorally served 213,650 Catholics (80.1% of 266,800 total) on 2,580 km in 90 parishes and 4 missions with 122 priests (83 diocesan, 39 religious), 1 deacon, 202 lay religious (43 brothers, 159 sisters) and 15 seminarians.

Apostolic Administrators of Rijeka

• Father Celso Benigno Luigi Costantini (剛恆毅) (1920.04.30 – 1921.07.21); later Titular Bishop of Hierapolis (1921.07.22 – 1922.09.09) as Apostolic Delegate (papal diplomatic envoy) to China (1922.08.12 – 1933.11.03), Titular Archbishop of Theodosiopolis in Arcadia (1922.09.09 – 1953.01.12), Founder of Congregation of the Disciples of the Lord (1931.03.31), Apostolic Administrator of Harbin 哈爾濱 (China) (1931.05.28 – 1933.11.03), Secretary of Sacred Congregation of the Propagation of the Faith (1935.12.20 – 1953.01.12), created Cardinal-Priest of Ss. Nereo ed Achilleo (1953.01.15 – 1958.06.09), Chancellor of Apostolic Chancery (1954.05.22 – 1958.10.17), cardinal title transferred as Cardinal-Priest of S. Lorenzo in Damaso (1958.06.09 – 1958.10.17)
• Isidoro Sain, Benedictine (O.S.B.) (1923 – 1925.04.25)

Suffragan Bishops of Rijeka – Opatija

• Isidoro Sain, O.S.B. (1925.04.25 – death 1932.01.28)
• Antonio Santin (1933.08.10 – 1938.05.16), later Bishop of Koper (Slovenia) (1938.05.16 – 1975.06.28), Bishop of Trieste (Italy) (1938.05.16 – 1975.06.28), created Archbishop ad personam (1963.07.13 – death 1981.03.17)
• Ugo Camozzo (1938.08.17 – 1948.01.13), later Metropolitan Archbishop of Pisa (Italy) (1948.01.13 – 1970.09.22), emeritate as Titular Archbishop of Hirina (1970.09.22 – death 1977.07.07)
• Apostolic Administrator Josep Srebrnic (1949 – 1952), while Bishop of Krk (Croatia) (1923.09.15 – death 1966.06.21), later created Archbishop ad personam (1963.03.02 – 1966.06.21)
• Apostolic Administrator Viktor Burić (1952 – 1969.08.20 see below), while Bishop of Senj–Modruš (Croatia) (1935.05.21 – 1969.08.20)

Metropolitan Archbishops of Rijeka – Senj

• Viktor Burić (see above 1969.08.20 – retired 1974.04.18), died 1983
• Josip Pavlišić (1974.04.18 – retired 1990.01.05), died 200; previously Titular Bishop of Bruzus (1951.12.13 – 1969.08.20) as Auxiliary Bishop of Senj–Modruš (Croatia) (1951.12.13 – 1969.08.20), then Titular Archbishop of Pićan (1969.08.20 – 1974.04.18) and (succeeding) Coadjutor Archbishop of Rijeka–Senj (1969.08.20 – 1974.04.18)
• Anton Tamarut (1990.01.05 – 2000.05.25 see below), previously Bishop of Šibenik (Croatia) (1986.02.05 – 1987.12.04), (succeeding) Coadjutor Archbishop of Rijeka–Senj (1987.12.04 – 1990.01.05)

Metropolitan Archbishops of Rijeka

• Anton Tamarut (2000.05.25 – death 2000.06.28)
• Ivan Devčić (17 November 2000 – 11 October 2022)
• Mate Uzinić (11 October 2022 – present)

• Roman Catholicism in Croatia
• Roman Catholic Diocese of Senj-Modruš

• GCatholic.org, with Google map and satellite photo
• Catholic Hierarchy
• Diocese website

45°19′36″N 14°26′37″E / 45.3267°N 14.4436°E / 45.3267; 14.4436