| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Shimboricho (関市) | 501-3909 |
| Postal/ZIP Codes in Shimizucho (関市) | 501-3977 |
| Postal/ZIP Codes in Shimmachi (関市) | 501-3847 |
| Postal/ZIP Codes in Shimmeicho (関市) | 501-3905 |
| Postal/ZIP Codes in Shimochi (関市) | 501-3217 |
| Postal/ZIP Codes in Shimonoho (関市) | 501-3521 |
| Postal/ZIP Codes in Shimoshirokane (関市) | 501-3955 |
| Postal/ZIP Codes in Shinden (関市) | 501-3257 |
| Postal/ZIP Codes in Shinhasama (関市) | 501-3923 |
| Postal/ZIP Codes in Shirakawacho (関市) | 501-3868 |
| Postal/ZIP Codes in Shitsuno (関市) | 501-3205 |
| Postal/ZIP Codes in Sobashima (関市) | 501-3957 |
| Postal/ZIP Codes in Suehirocho (関市) | 501-3848 |
| Postal/ZIP Codes in Sumiyoshicho (関市) | 501-3846 |
| Postal/ZIP Codes in Taiheicho (関市) | 501-3833 |
| Postal/ZIP Codes in Taiheidai (関市) | 501-3952 |
| Postal/ZIP Codes in Takarayamacho (関市) | 501-3964 |
| Postal/ZIP Codes in Tatekiri Kita (関市) | 501-3228 |