K
- (Ube Shi) Kibe-ichi
- (Ōshima-gun) Komatsu
- (Kumage-gun) Koiwai Jima
- (Kudamatsu Shi) Kamikoigahama
- (Shimonoseki Shi) Kogushi
- (Yamaguchi Shi) Kogiwara
- (Ōshima-gun) Kodomari
- (Shimonoseki Shi) Koda
- (Yamaguchi Shi) Kōchidani
- (Abu-gun) Kiyo
- (Nagato Shi) Kiwado
- (Ube Shi) Kiwa
- (Nagato Shi) Kitsu
- (Shimonoseki Shi) Konpirachō
- (Yamaguchi Shi) Kewari
- (Shūnan Shi) Kawasaki
- (Yamaguchi Shi) Katsuyama
- (Shūnan Shi) Katayama
- (Shūnan Shi) Kanoji
- (Shūnan Shi) Kano
- (Ube Shi) Kami-yahagi
- (Kumage-gun) Kaminoseki
- (Shūnan Shi) Kamimura
- (Mine Shi) Kamaichi
- (Shimonoseki Shi) Kagawa
- (Yanai Shi) Kugaji
- (Yamaguchi Shi) Kōzuno
- (Shimonoseki Shi) Kamishinchichō
- (Shimonoseki Shi) Kandachō
- (Shimonoseki Shi) Kansei-honmachi