NKB

NKB may refer to:


 * Neurokinin B, a neuropeptide
 * Dutch Korfball Association, former name of the Royal Dutch Korfball Association
 * National Royalist Movement, a Belgian resistance group in World War II
 * People's Commissariat of Munitions, in the USSR
 * the ISO 639-3 language code for Khoibu language, a language spoken in India
 * the IATA code for Noonkanbah Airport in Australia, in List of airports in Australia