New Jersey ZIP Codes can be found by post office location on the state of New Jersey's official website. The United States Postal Service offers a search tool that can find all ZIP codes, including those in New Jersey.
The state of New Jersey website lists post office names in alphabetical order, including any substations a post office may have. The ZIP code search on the USPS website requires a user to enter a street address, city and state to view the ZIP code for that area. In addition, Maps of the World has a ZIP code map of New Jersey outlining each area covered by a ZIP code in the state.