| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Cove, Union | 97824 |
| Postal/ZIP Codes in Elgin, Union | 97827 |
| Postal/ZIP Codes in Imbler, Union | 97841 |
| Postal/ZIP Codes in Island City, Union | 97850 |
| Postal/ZIP Codes in La Grande, Union | 97850 |
| Postal/ZIP Codes in North Powder, Union | 97867 |
| Postal/ZIP Codes in Summerville, Union | 97876 |
| Postal/ZIP Codes in Union, Union | 97883 |