BNK may refer to:
BNK Petroleum, a California-based oil company spun off in 2008 from Bankers Petroleum Bankers Petroleum (Toronto Stock Exchange symbol), a Canadian oil company Ballina Byron Gateway Airport (IATA code), a small regional airport in Ballina, New South Wales, Australia The Kurdish Digital Library, ( (BNK)) BNK, a Russian aviation acronym for (Bureau of New Construction) BNK, () Military Industrial Company BNK, a computer file format "B.N.K.", a song by Eazy-E and Bone Thugs-n-Harmony from The Collection B-NK (Progenitor for B and NK), a term related to lymphopoiesis BNK, Busan Bank BNK48, an idol group based in Bangkok, Thailand
See also BNK Financial Group, one of the three regional financial holding companies in South Korea