Olbia (Italian: [ˈɔlbja] , or locally [ˈolbja]; Gallurese Tarranòa, Sardinian: Terranòa) is a town and comune of 56,231 inhabitants (2010) in northeastern Sardinia (Italy), in the Gallura sub-region. Called Olbia in the Roman age, Civita in the Middle Ages (Giudicati period) and Terranova Pausania before the 1940s, Olbia was again the official name of the town after the period of Fascism.