| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Nishime (鶴岡市) | 999-7541 |
| Postal/ZIP Codes in Nishinuma (鶴岡市) | 997-1112 |
| Postal/ZIP Codes in Nishishinsaimachi (鶴岡市) | 997-0045 |
| Postal/ZIP Codes in Nodanome (鶴岡市) | 999-7636 |
| Postal/ZIP Codes in Nozomimachi (鶴岡市) | 997-0819 |
| Postal/ZIP Codes in Nunome (鶴岡市) | 997-0851 |
| Postal/ZIP Codes in Oami (鶴岡市) | 997-0531 |
| Postal/ZIP Codes in Oara (鶴岡市) | 999-7547 |
| Postal/ZIP Codes in Obari (鶴岡市) | 997-0414 |
| Postal/ZIP Codes in Ogawara (鶴岡市) | 997-0806 |
| Postal/ZIP Codes in Oguni (鶴岡市) | 999-7316 |
| Postal/ZIP Codes in Ohiro (鶴岡市) | 999-7543 |
| Postal/ZIP Codes in Oiwagawa (鶴岡市) | 999-7123 |
| Postal/ZIP Codes in Okawado (鶴岡市) | 999-7661 |
| Postal/ZIP Codes in Okayama (鶴岡市) | 997-0843 |
| Postal/ZIP Codes in Omonoyama (鶴岡市) | 997-1116 |
| Postal/ZIP Codes in Onabe (鶴岡市) | 999-7125 |
| Postal/ZIP Codes in Onishimachi (鶴岡市) | 997-0831 |