| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Shummei (一宮市) | 491-0003 |
| Postal/ZIP Codes in Suehiro (一宮市) | 491-0918 |
| Postal/ZIP Codes in Sugiyama (一宮市) | 491-0136 |
| Postal/ZIP Codes in Sumiyoshi (一宮市) | 491-0919 |
| Postal/ZIP Codes in Tadokoro (一宮市) | 491-0133 |
| Postal/ZIP Codes in Taishodori (一宮市) | 491-0054 |
| Postal/ZIP Codes in Tajimacho (一宮市) | 491-0086 |
| Postal/ZIP Codes in Takahatacho (一宮市) | 491-0073 |
| Postal/ZIP Codes in Takaki (一宮市) | 491-0837 |
| Postal/ZIP Codes in Takata (一宮市) | 491-0125 |
| Postal/ZIP Codes in Takehashicho (一宮市) | 491-0937 |
| Postal/ZIP Codes in Tamano (一宮市) | 494-0013 |
| Postal/ZIP Codes in Tanyocho Dosaki (一宮市) | 491-0825 |
| Postal/ZIP Codes in Tanyocho Itsukaichiba (一宮市) | 491-0823 |
| Postal/ZIP Codes in Tanyocho Kokonokaichiba (一宮市) | 491-0824 |
| Postal/ZIP Codes in Tanyocho Mitsui (一宮市) | 491-0826 |
| Postal/ZIP Codes in Tanyocho Morimoto (一宮市) | 491-0827 |
| Postal/ZIP Codes in Tanyocho Sarugaido (一宮市) | 491-0838 |