奥尔比亚（意大利语：Olbia）是位于意大利撒丁岛上奥尔比亚-坦皮奥省的一个城市。人口约有5.1万人。自2005年起，奥尔比亚成为奥尔比亚-坦皮奥省的首府之一。

奥尔比亚据传说很可能是由古希腊人所创建的，到了罗马时代它则成为了重要的港口，现在还留有腓尼基人和迦太基人的遗迹，而在中世纪，它则是撒丁岛上4个独立国家的首都之一。

Olbia (Italian: [ˈɔlbja], locally: [ˈolbja]; Sardinian:Terranòa; Gallurese: Tarranòa) is a city and comune of 58,066 inhabitants (February 2014) 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 city during the period of Fascism.