Buk or BUK may refer to:
Places Czech Republic Buk (Prachatice District), a municipality and village in the South Bohemian Region Buk (Přerov District), a municipality and village in the Olomouc Region Buk, a village and part of Jindřichův Hradec in the South Bohemian Region Buk, a village and part of Milín in the Central Bohemian Region
Poland Buk, Greater Poland Voivodeship, a town in western Poland Gmina Buk, the administrative unit Buk, Podkarpackie Voivodeship, south-east Poland Buk, Lesser Poland Voivodeship, south Poland Buk, Goleniów County, West Pomeranian Voivodeship, North-west Poland Buk, Police County, West Pomeranian Voivodeship, north-west Poland Buk Góralski, a village in Kuyavian-Pomeranian Voivodeship, mid-northern Poland Buk Pomorski, a village in Kuyavian-Pomeranian Voivodeship, mid-northern Poland
Other places Buk, Bulgaria, a village Buk, Croatia, a village Bük, a village in Hungary Būk, a village in Iran Paranesti, a village in Greece formerly called Buk Buk District (disambiguation), several districts in South Korea
People Choe Buk (), Korean painter Tadeusz Buk (1960–2010), Polish soldier, Commander of the Polish Land Forces
Other uses Buk (drum), a Korean drum BES-5, also known as Buk, a Soviet reactor Buk missile system, a Soviet and Russian missile system Bukawa language, by ISO 639 code Bayero University Kano, Nigeria
See also Buk Bak, a Ghanaian musical group