Knox County Maine is covered by a total of 21 ZIP Codes. There are 2 ZIP Codes in Knox County that extend into adjacent counties ( and Lincoln County). Of the ZIP codes within or partially within Knox County there are 17 Standard ZIP Codes and 4 PO Box ZIP Codes.
Click on the ZIP Codes in the interactive map to view more information. The map control in the upper right corner can be used to toggle map layers on and off. The red outline is the border of Knox County and can be turned on and off. Each type of postal code can also be turned on and off.
| ZIP Code | ZIP Code City/Town | ZIP Code Type | |||
|---|---|---|---|---|---|
| Friendship | Standard | |||
| Cushing | Standard | |||
| Waldoboro | Standard | |||
| Washington | Standard | |||
| Isle Au Haut | PO Box | |||
| Rockland | Standard | |||
| Camden | Standard | |||
| Hope | Standard | |||
| Matinicus | PO Box | |||
| North Haven | Standard | |||
| Owls Head | Standard | |||
| Port Clyde | PO Box | |||
| Rockport | Standard | |||
| South Thomaston | Standard | |||
| Spruce Head | Standard | |||
| Tenants Harbor | Standard | |||
| Thomaston | Standard | |||
| Union | Standard | |||
| Vinalhaven | Standard | |||
| Warren | Standard | |||
| West Rockport | PO Box |