| Locality | Post Code |
|---|---|
| Nakamichi (長井市) | 993-0053 |
| Narita (長井市) | 993-0075 |
| Omachi (長井市) | 993-0083 |
| Others (長井市) | 993-0000 |
| Saiwaicho (長井市) | 993-0051 |
| Sakaemachi (長井市) | 993-0084 |
| Shimizucho (長井市) | 993-0054 |
| Shimmachi (長井市) | 993-0052 |
| Shimmeicho (長井市) | 993-0004 |
| Shimoisazawa (長井市) | 993-0023 |
| Shirosagi (長井市) | 993-0071 |
| Tatemachi Kita (長井市) | 993-0011 |
| Tatemachi Minami (長井市) | 993-0013 |
| Teraizumi (長井市) | 993-0061 |
| Tokamachi (長井市) | 993-0086 |
| Tokiniwa (長井市) | 993-0035 |
| Utamaru (長井市) | 993-0034 |
| Yashiromachi (長井市) | 993-0002 |
| Yokomachi (長井市) | 993-0087 |
| Yotsuya (長井市) | 993-0015 |