KKJ (disambiguation)

KKJ may refer to:
 * Kamikaze Kaitō Jannu or Phantom Thief Jeanne, a magical girl shōjo manga series
 * Kitakyushu Airport, the IATA code KKJ
 * Kokura Airport, the former IATA code KKJ
 * Bantu language, the ISO 639-3 code KKJ
 * Kylie Jenner, whose initials are KKJ