| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Sekishita (東金市) | 283-0038 |
| Postal/ZIP Codes in Sekiuchi (東金市) | 283-0014 |
| Postal/ZIP Codes in Shimomuzata (東金市) | 283-0012 |
| Postal/ZIP Codes in Shimoya (東金市) | 283-0054 |
| Postal/ZIP Codes in Shinoda (東金市) | 283-0013 |
| Postal/ZIP Codes in Shuku (東金市) | 283-0033 |
| Postal/ZIP Codes in Shuzo (東金市) | 283-0831 |
| Postal/ZIP Codes in Susukishima (東金市) | 283-0031 |
| Postal/ZIP Codes in Takakura (東金市) | 283-0022 |
| Postal/ZIP Codes in Taki (東金市) | 283-0825 |
| Postal/ZIP Codes in Takisawa (東金市) | 283-0833 |
| Postal/ZIP Codes in Tama (東金市) | 283-0005 |
| Postal/ZIP Codes in Tanaka (東金市) | 283-0814 |
| Postal/ZIP Codes in Tanno (東金市) | 283-0824 |
| Postal/ZIP Codes in Togane (東金市) | 283-0802 |
| Postal/ZIP Codes in Tonomawari (東金市) | 283-0025 |
| Postal/ZIP Codes in Uwaya (東金市) | 283-0046 |
| Postal/ZIP Codes in Yamada (東金市) | 283-0823 |
| Postal/ZIP Codes in Yamaguchi (東金市) | 283-0813 |
| Postal/ZIP Codes in Yasakadai (東金市) | 283-0801 |
| Postal/ZIP Codes in Yokojima (東金市) | 283-0055 |
| Postal/ZIP Codes in Yui (東金市) | 283-0804 |