In Bergen County, Mahwah Post Office has the most zip codes - 7430, 7498 and 7495.
It is closely followed by Hackensack, Paramus, Ridgewood and Teaneck post offices with 2 zip codes each.
In Camden County, Camden Post Office has 5 zip codes - 8101, 8104, 8102, 8105 and 8103.
Next up are Cherry Hill Post Office with 3 and Bellmawr Post Office with a couple of zip codes.
In Essex County, Newark Post Office has 23 zip codes, which is the highest for that County. It is followed by East Orange Post Office with 3 zip codes.
