BII

BII, Bii, bii, may refer to:

Places

 * Bikini Atoll Airport, Marshall Islands (IATA code: )
 * U1 (Berlin U-Bahn), formerly BII

People

 * Bii (singer) (born 1989), Taiwanese singer

Groups, organizations, companies

 * Bank Internasional Indonesia, former name of Bank Maybank Indonesia
 * Basel Institute for Immunology
 * Birds International Incorporated
 * British Institute of Innkeeping
 * British International Investment, a development finance institution of the UK government (formerly CDC Group plc, Commonwealth Development Corporation, and Colonial Development Corporation)

Other uses

 * Business interoperability interface, interface that enables business interoperability between organisational systems
 * Bisu language (ISO 639: ), Loloish language spoken in Thailand
 * Biyelgee, also called bii, Mongolian dance