Princeton, NJ ZIP Codes
Princeton, New Jersey has 5 ZIP codes: 2 for street addresses ( and ), 1 for PO boxes () and 2 for single organizations.
Your street decides which one you use.
Which Princeton ZIP code is my address in?
Street ranges from the Census Bureau, 2026. PO box and organization ZIP codes are not found by street. A new street may be missing: address not found?
Princeton ZIP code map
Tap or point to an area to see its ZIP code.Full-size map
08541, 08543 and 08544 have no area on the map: they are PO box or single-organization ZIP codes. Dashed line: Princeton city limits.
Map: Census Bureau ZIP Code Tabulation Areas (2020) and place limits (2024).
All Princeton ZIP codes by type
| ZIP | Type and post office or station |
|---|---|
| 08540 | street delivery Princeton |
| 08541 | one organization Princeton |
| 08542 | street delivery Princeton |
| 08543 | PO boxes at the Princeton post office Princeton |
| 08544 | one organization Princeton |
Why your mail may say Princeton when you live outside it
Princeton ZIP codes also cover Franklin Township, West Windsor Township and Lawrence Township, so a letter addressed to Princeton can go to a home outside the city limits.
A ZIP code does not set your city, school district or tax. Mercer County property records show which city you are in.
Princeton ZIP code questions
What is the main ZIP code for Princeton?
08540, the ZIP code of the main Princeton post office at 213 Carnegie Ctr.
Which Princeton ZIP codes are for PO boxes only?
08543. Mail to it goes to boxes at the post office, not to street addresses.
What county is Princeton in?
Mercer County.
ZIP codes for towns near Princeton
More towns near Princeton: Franklin Township, Hamilton Township, Trenton, North Brunswick Township, Monroe Township, Lower Makefield Township, East Brunswick Township, Falls Township, New Brunswick.
Sources and last checked
USPS ZIP Locale Detail (October 1, 2026), GeoNames (CC BY 4.0), U.S. Census Bureau, HUD-USPS crosswalk.
Checked October 20, 2026. Sources · How we build our lists · Corrections