AO

AO, aO, Ao, or ao may refer to:

==Places== Ao (building) Ao, Estonia, village in Väike-Maarja Parish, Lääne-Viru County, Estonia Ao Line, commuter railway line in Hyōgo Prefecture, Japan Ao River (Zhejiang) (鳌江), Zhejiang, China Ao River (Fujian) (敖江), Fujian, China Ao Station, railway station in the city of Ono, Hyōgo Prefecture, Japan Aodu, capital of Shang dynasty, near Zhengzhou Aoshima, Ehime, island in Japan Aoshima, Miyazaki, island in Japan Angola (ISO 3166-1 alpha-2 code AO)