AoS or AOS may refer to:
The Aosta Valley (Italian: Valle d'Aosta [ˈvalle daˈɔsta] (official) or Val d'Aosta (usual); French: Vallée d'Aoste [vale daɔst]/[vale dɔst] (official) or Val d'Aoste (usual); Arpitan: Val d'Outa) is a mountainous semi-autonomous region in northwestern Italy.
Aosta ([aˈɔsta]; French: Aoste - [ɔst] Arpitan: Aoûta; Latin: Augústa Prætṓrĭa Salassṓrum) is the principal city of Aosta Valley, a bilingual region in the Italian Alps, 110 km (68 mi) north-northwest of Turin.
Aosdána (/iːsˈdɑːnə/; from aos dána "people of the arts") is an Irish association of artists. It was created in 1981 on the initiative of a group of writers with support from the Arts Council of Ireland.
Aoste is a French commune in the Isère department in the Auvergne-Rhône-Alpes region of southeastern France.
The aos sí ([eːs ˈʃiː], older form aes sídhe [eːs ˈʃiːðʲə]) is the Irish term for a supernatural race in Irish mythology and Scottish mythology (usually spelled Sìth, however pronounced the same), comparable to the fairies or elves.
The Aosta Mechanized Brigade is a mechanized infantry brigade of the Italian Army, based on the island of Sicily.
Aoshima (青島, Aoshima) is an island located in Miyazaki, Miyazaki Prefecture, Japan. The island has a surface area of 4.4 hectares (10.9 acres) and a height of 6 metres (20 feet).
Aosta Valley (Vallée d'Aoste, VdA) is a regionalist coalition of parties active in Aosta Valley, Italy.
Aoshima (青島, Aoshima), also known as Cat Island (猫の島, Neko no shima), is an island in Ehime Prefecture, Japan, known for its large number of feline residents.