Er is één plaats met de naam Optongni in Zuid-Korea.
Alle plaatsen in de wereld die "Optongni" heten.
Sinchon (14)
Sangchon (13)
Naedong (13)
Taedong (12)
Songjong (12)
Pyongchon (12)
Cholgol (12)
Yongdong (12)
Singi (12)
Changdong (12)
Haktong (11)
Tongchon (11)
Saeto (11)
Chungni (11)
Hadong (11)
Wolchon (11)
Chungdong (11)
Yangchon (11)
Kyodong (10)
Yongsan (10)
Songjongni (10)
Yongam (10)
Tokkol (10)
Sadong (10)
Chungsan (10)
Wondong (10)
Chungchon (10)
Sangni (10)
Songsan (10)
Sinpyong (10)