Post Offices List in Oak Harbor City, Washington:
| Oak Harbor Post Office | 1155 Se City Beach St, Oak Harbor, WA 98277 |
| Whidbey Island Naval Air Post Office | 1080 W Lexington St, Oak Harbor, WA 98278 |
| Oak Harbor Post Office | 1155 Se City Beach St, Oak Harbor, WA 98277 |
| Whidbey Island Naval Air Post Office | 1080 W Lexington St, Oak Harbor, WA 98278 |