Municipalities The provincial capital, the city of Fiume, was annexed to Italy with the
Treaty of Rome, (27 January 1924), and the formal Italian annexation occurred on 16 March 1924, and the Rijeka province between April 1941 and September 1943, when it included the islands of
Krk and
Rab. Amongst the municipalities with the highest percentage of Italian population was Laurana, followed by Volosoca, with the town of Opatija. The majority of inhabitants of the municipalities besides the Italian presence, were ethnic Croats. An exception to this was Opatija, where there was no ethnic majority but were over-represented by Italians, Croats, and Slovenes, and a small number of ethnic German.
Towns and villages • Fiume (Rijeka): Borgomarina, Cosala (Kozala), Drenova (Drenova), Plasse (Plase). • Abbazia (
Opatija): Apriano (Veprinac), Crissizza (Križevice), Lipovizza (Lipovica), Pogliane (Poljane), Preluca (Preluka), Scherbici (Škrbići), Slatina (Slatina), Vassania (Vašanska), Volosca (Volosko ). • Draga di Moschiena (
Mošćenička Draga): Bersezio (Brseč), Cala (Kalac), Obers (Obrš), Riva Mošćenička (Krai), Ruins (Ruins), San Pietro (St. Peter), St. Antonio (St. Anton), Selza (Flint ), Trebisca (Trebišća), Monte Maggiore (Učka), Valsantamarina (Moscenicka Draga). • Laurana (
Lovran): Bacova, Cali, Cosuli, Dobrecchi, Draga Laurana, Giagnetici, Ica, Monte, Oprino, Carnaro of Saint Francis, Saint-Roch Ligani, Smarici, Tuliano, Visozze, Ucovazzi. • Primano (
Prem): Berdo San Giovanni, Bittigne di Sopra, Bittigne di Sotto, Ceglie, Mt Chilovi, Ratečevo in Monte Sméria. • Matteria (
Materija): Artuise, Bresovizza Marenzi, Bresovoberdo, Calcizza, Cosiane, Coticcina, Gelovizza, Golazzo, Gradiscizza, Loccegrande, Marcossina, Mersane, Orecca, Ostrovizza, Pusane, Rosizze, Scandaussina, Slivia of Castelnuovo, Tow, Tatre, Tublie, Vodice Castelnuovo . • Castel Iablanizza (
Jablanica): Cottésevo, Iasena of Bisterza, Terciane, Verbizza,
Verbovo, Villa Podigraie, Zabice Castelvecchio di Sopra Zemon, Zemon di Sotto. • Villa del Nevoso (
Ilirska Bistrica):Torrenova Bucovizza Large, Small Bucovizza, Caries, Cossese, Merecce, Poglie, Postegna, Postegnesca, Sarecce, Sarecizza Val Timavo, Sose, Tomigna, Topolza, Bisterza of Torrenova . •
Knežak: Baccia of Bisterza, Coritenza of Bisterza, Drescozze, Sagòria San Martin, San Giorgio, Sémbie, Taborgrande, Tabor Sémbie. •
Jelšane: Berdo of Elsane, Berze, Cracinanova, Dolegne of Elsane, Fabice, Lippa of Elsane, Passiaco, Ruppa, Sappiane, Sussa, Villanova. • Mattuglie (
Matulji): Bergut Large, Small Bergut, Biscopi, Bresa, Corsenico, Criva, Cuceli, Cusnici, Ferlania, Francici, Gai, Gerzancici, Ghersetici, Gerzici, Giordani, Giussici Border, Michelici, fungal, Monte, Mussici, Pereni, Pobri, Possici, Pucari, Pussevi, Pusi, Ruccavazzo High, Low Ruccavazzo, Russici, Serapena, Snidari, Suonecchia, Suseni, Tertini, Varlieni, Vissici. • Castelnuovo (
Podgrad): Crussizza of Castelnuovo, Eriacci, Gabrega, Giavorie, Gradischie of Cast, Mune Large, Small Mune, Obrovo Santa Maria, Paulizza, Pobese, Pogliane, Pregara, Prelose Sant'Egidio, Racizze, Rittomece, Sabogna, Seiane, Starada, Studena in Monte Zaielse. • Clana (
Klana): Isera, San Rocco, Scalnizza, Studena, Zidovje.
Districts •
Bisterza, divided into Bisterza and Torrenova of Bisterza. •
Fiume, divided into the wards of
Abbazia and
Fiume. ==Infrastructure==