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RKB may refer to:

  • Reichs Kolonial Bund
  • Responder Knowledge Base
  • Restaurant Kitchen Buffet uses RKB as an LNER code in British Rail coach designations
  • Ro-Kyu-Bu!
  • Robert K. Burt, founder of R. K. Burt & Company Ltd. who run the RKB Gallery on Union Street, London
  • RKB Mainichi Broadcasting
  • RKB Radio
  • Rotary kelly bushing, a mechanical device used in drilling operations to rotate the drill string