| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Omagari Nakadorimachi (大仙市) | 014-0024 |
| Postal/ZIP Codes in Omagari Nishine (大仙市) | 014-0072 |
| Postal/ZIP Codes in Omagari Omachi (大仙市) | 014-0025 |
| Postal/ZIP Codes in Omagari Sakaecho (大仙市) | 014-0061 |
| Postal/ZIP Codes in Omagari Shiroganecho (大仙市) | 014-0015 |
| Postal/ZIP Codes in Omagari Sumiyoshicho (大仙市) | 014-0034 |
| Postal/ZIP Codes in Omagari Suwacho (大仙市) | 014-0047 |
| Postal/ZIP Codes in Omagari Tamachi (大仙市) | 014-0046 |
| Postal/ZIP Codes in Omagari Tomakicho (大仙市) | 014-0043 |
| Postal/ZIP Codes in Omagari Torimachi (大仙市) | 014-0027 |
| Postal/ZIP Codes in Omagari Wakabacho (大仙市) | 014-0045 |
| Postal/ZIP Codes in Omaki (大仙市) | 019-2331 |
| Postal/ZIP Codes in Onukitakabatake (大仙市) | 014-0064 |
| Postal/ZIP Codes in Osawagoshuku (大仙市) | 019-2202 |
| Postal/ZIP Codes in Osawagotera (大仙市) | 019-2103 |
| Postal/ZIP Codes in Otacho Eidai (大仙市) | 019-1616 |
| Postal/ZIP Codes in Otacho Higashiimaizumi (大仙市) | 019-1614 |
| Postal/ZIP Codes in Otacho Kawaguchi (大仙市) | 019-1615 |