| Locality | Postal Code |
|---|---|
| Noborito (鴻巣市) | 365-0052 |
| Nukata (鴻巣市) | 365-0059 |
| Oashi (鴻巣市) | 369-0137 |
| Oinezuka (鴻巣市) | 365-0033 |
| Oma (鴻巣市) | 365-0054 |
| Others (鴻巣市) | 365-0000 |
| Raiden (鴻巣市) | 365-0077 |
| Saiwaicho (鴻巣市) | 365-0057 |
| Sakaecho (鴻巣市) | 365-0055 |
| Sakai (鴻巣市) | 365-0013 |
| Sakasagawa (鴻巣市) | 365-0047 |
| Sanchomen (鴻巣市) | 369-0134 |
| Sekishinden (鴻巣市) | 365-0004 |
| Shimmei (鴻巣市) | 365-0074 |
| Shimoinezuka (鴻巣市) | 365-0035 |
| Shimoshi (鴻巣市) | 369-0113 |
| Shimoya (鴻巣市) | 365-0025 |
| Shinshuku (鴻巣市) | 369-0111 |
| Sumireno (鴻巣市) | 365-0067 |
| Takimamuro (鴻巣市) | 365-0044 |
| Tenjin (鴻巣市) | 365-0036 |
| Teraya (鴻巣市) | 365-0071 |
| Tsukuba (鴻巣市) | 369-0114 |
| Tsutsumicho (鴻巣市) | 365-0056 |