Hapkidowon - World Hapkido Headquarters, is located 387 Magnolia Ave. #101 Corona, California USA; World Hapkido Dojang List - Hapkido Headquarters / Hapkido Association / Hapkido Federation ; Headquarters is located near Riverside, Corona, Norco, Los Angeles, Pomona, Ontario, Rancho Cucamunga, Moreno Valley, Chino, Chino Hills, San Diego, Oceanside, Santa Ana, Fullerton, Yorba Linda, San Dimas, Lake Matthew, El Cerrito, Home Gardens, Eastvale, Butterfield, Pedley, Woodcrest, Lake Elsinore, Perris, Upland, Placentia, Rowland Heights, Diamond Bar, Claremont, Anaheim, LaMirada, Disneyland, Garden Grove, Orange, Tustin, Buena Park, LaHabra, Whittier, West Covina, Hacienda Heights, Glendora, Rialto, Redlands, Norwalk, Cypress, Westminster, Fountain Valley,Long Beach, Seal Beach, Malibu, Torrence, Redondo Beach, Lakewood, Bellflower, Downey, Bell, Huntington Beach, Costa Mesa, Irvine, Lake Forrest, Laguna Beach.