I
- (Shimonoseki Shi) Iriechō
- (Hikari Shi) Iwata
- (Hagi Shi) Ichi
- (Yamaguchi Shi) Ichi
- (Hagi Shi) Ichi
- (Ōshima-gun) Ihota
- (Nagato Shi) Ii
- (Shūnan Shi) Imaichi
- (Mine Shi) Irimi
- (Mine Shi) Isa
- (Yamaguchi Shi) Itamidō
- (Kumage-gun) Iwaishima
- (Ōshima-gun) Izaki
- (Shimonoseki Shi) Izakichō
- (Shimonoseki Shi) Ichinomiya-oroshihonmachi
- (Shimonoseki Shi) Ichinomiya-sumiyoshi
- (Shimonoseki Shi) Ichinomiya-gakuenchō
- (Shimonoseki Shi) Ichinomiyachō
- (Shimonoseki Shi) Ikunochō
- (Shimonoseki Shi) Ishigamichō
- (Shimonoseki Shi) Imaurachō
- (Iwakuni Shi) Iwakuni