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.

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 : As per 2014, it pastorally served 213,650 Catholics (80.1% of 266,800 total) on 2,580 km2 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.