TKK can stand for:
Kuningas Pähkinä, a stage name of Finnish rap artist My Life with the Thrill Kill Kult band's nickname Teknillinen korkeakoulu (Helsinki University of Technology) - a former Finnish university IATA Airport Code for Chuuk International Airport Tanda Kecakapan Khusus, Indonesian Scout merit badges Tokyu Corporation (Tokyo KyuKo Railway) Toyo Kisen Kaisha (Oriental Steamship Company)