| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Araomachi (東海市) | 476-0003 |
| Postal/ZIP Codes in Araomachimizubuka (東海市) | 476-0004 |
| Postal/ZIP Codes in Asayama (東海市) | 476-0006 |
| Postal/ZIP Codes in Chuomachi (東海市) | 476-0013 |
| Postal/ZIP Codes in Fukinodai (東海市) | 476-0014 |
| Postal/ZIP Codes in Fukishimamachi (東海市) | 476-0011 |
| Postal/ZIP Codes in Fukishimamachifushimi (東海市) | 476-0012 |
| Postal/ZIP Codes in Kagiyamachi (東海市) | 477-0032 |
| Postal/ZIP Codes in Minamishibatamachi (東海市) | 476-0001 |
| Postal/ZIP Codes in Motohamamachi (東海市) | 477-0035 |
| Postal/ZIP Codes in Nakanoike (東海市) | 477-0033 |
| Postal/ZIP Codes in Nawamachi (東海市) | 476-0002 |
| Postal/ZIP Codes in Otamachi (東海市) | 477-0031 |
| Postal/ZIP Codes in Others (東海市) | 476-0000 |
| Postal/ZIP Codes in Shimpomachi (東海市) | 476-0005 |
| Postal/ZIP Codes in Takayokosukamachi (東海市) | 477-0037 |
| Postal/ZIP Codes in Tokaimachi (東海市) | 476-0015 |
| Postal/ZIP Codes in Yabumachi (東海市) | 477-0034 |
| Postal/ZIP Codes in Yokosukamachi (東海市) | 477-0036 |