IKB may refer to:
Science International Klein Blue, a deep blue hue IκB (I-kappa-B), a protein complex
Other uses IKB Deutsche Industriebank, a German bank Ikebukuro Station (JR East station code), Japan Isambard Kingdom Brunel (1806–1859), British engineer Wilkes County Airport (IATA code), North Carolina, US Irving K. Barber Learning Centre, University of British Columbia, Canada