The Bangor Zip Code is 04401, 04402. If you want to send a mail to Bangor City, you should use the 04401, 04402 Zip Code. In 1983, the U.S. Postal Service introduced an expanded Bangor ZIP code system that it called ZIP+4, often called "plus-four codes", "add-on codes", or "add ons".How do I Find my complete ZIP code?
If you want to find ZIP Codes by city, the USPS offers an Online ZIP Code look-up tool. Go to the Online USPS ZIP Code look-up tool. Click the "Search By City" tab. Enter the city and state you want to find ZIP Codes for in the appropriate fields. Click the "Submit" button to display a list of all ZIP Codes associated with that city.