Bui

Bui may refer to:
 * Bank Unique Identifier
 * Bui (Cameroon department), an administrative subdivision
 * Bùi, a common Vietnamese surname
 * Bui Dam, Ghana
 * Bui National Park, Ghana
 * An enemy character in the anime/manga YuYu Hakusho
 * Gianni Bui, Italian footballer

The acronym BUI may refer to:
 * Baptist Union of Ireland
 * Boating Under the Influence
 * Boxing Union of Ireland
 * Browser user interface
 * Bokondini Airport, Indonesia (IATA code: BUI)
 * Biking Under the Influence