The Ontario, OR-ID MSA has 19 ZIP codes, listed below in numerical order. Sort this list by county or by population.
| ZIP Code | Place Name | County | Type |
|---|---|---|---|
| ZIP 83607 | Caldwell | Canyon County | Standard |
| ZIP 83619 | Fruitland | Payette County | Standard |
| ZIP 83655 | New Plymouth | Payette County | Standard |
| ZIP 83660 | Parma | Canyon County | Standard |
| ZIP 83661 | Payette | Payette County | Standard |
| ZIP 97901 | Adrian | Malheur County | Standard |
| ZIP 97902 | Arock | Malheur County | PO Box |
| ZIP 97903 | Brogan | Malheur County | Standard |
| ZIP 97906 | Harper | Malheur County | Standard |
| ZIP 97907 | Huntington | Baker County | Standard |
| ZIP 97908 | Ironside | Malheur County | Standard |
| ZIP 97909 | Jamieson | Malheur County | Standard |
| ZIP 97910 | Jordan Valley | Malheur County | Standard |
| ZIP 97911 | Juntura | Malheur County | Standard |
| ZIP 97913 | Nyssa | Malheur County | Standard |
| ZIP 97914 | Ontario | Malheur County | Standard |
| ZIP 97917 | Riverside | Malheur County | Standard |
| ZIP 97918 | Vale | Malheur County | Standard |
| ZIP 97920 | Westfall | Malheur County | PO Box |