| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Sukumojima (周南市) | 745-0804 |
| Postal/ZIP Codes in Suma (周南市) | 745-0401 |
| Postal/ZIP Codes in Sumiyoshicho (周南市) | 745-0064 |
| Postal/ZIP Codes in Sumizakicho (周南市) | 745-0026 |
| Postal/ZIP Codes in Susuma Hongo (周南市) | 745-0122 |
| Postal/ZIP Codes in Susuma Oku (周南市) | 745-0121 |
| Postal/ZIP Codes in Suyama (周南市) | 747-0621 |
| Postal/ZIP Codes in Takamizuhara (周南市) | 745-0662 |
| Postal/ZIP Codes in Takaodanchi (周南市) | 745-0885 |
| Postal/ZIP Codes in Takase (周南市) | 746-0101 |
| Postal/ZIP Codes in Takeshimacho (周南市) | 746-0007 |
| Postal/ZIP Codes in Tao (周南市) | 746-0103 |
| Postal/ZIP Codes in Toishi (周南市) | 745-0816 |
| Postal/ZIP Codes in Tokuyama (周南市) | 745-0851, 745-0123 |
| Postal/ZIP Codes in Tokuyamaminatomachi (周南市) | 745-0045 |
| Postal/ZIP Codes in Tonda (周南市) | 746-0034 |
| Postal/ZIP Codes in Tsujimachi (周南市) | 745-0001 |
| Postal/ZIP Codes in Tsukiokacho (周南市) | 745-0062 |