Fiume is the historical name of Rijeka, a city in Croatia.

Fiume may also refer to:

Geography Free State of Fiume, a historic state that existed between 1920 and 1924 Fiume Veneto, a municipality in the Italian region Friuli-Venezia Giulia Fiume di Girgenti, a river of Sicily rising from hills south of the city of Agrigento Fiume Grande, a river of northern Sicily flowing into the Tyrrhenian sea near Palermo

Other Italian cruiser Fiume of the Italian Regia Marina Gloria Fiume, an old Italian football association now renamed HNK Rijeka Paolo Dal Fiume, Italian footballer Salvatore Fiume, an Italian painter, sculptor, architect and writer