609
Covers central and southeastern New Jersey
In service since 1956
Split from area code 201
Overlay with 640
City facts
Princeton area code
Area code for central and southeastern New Jersey: history, overlays and how to dial.
609
Princeton uses area code 609. Because more than one area code serves the same area, local calls need all ten digits.
About area code 609
How to call a number in Princeton
Inside the US
1 (609) 555-0123Dial 1, the area code, then the seven-digit number.Local call
(609) 555-0123Overlay area: always include the area code.From outside the US
+1 609 555 0123Use your country's exit code or +, then 1 for the US.Princeton is on Eastern Time (ET); check the time before calling from another zone.
Other cities that share 609
Nearby area codes
| Area code | Used in | Distance |
|---|---|---|
| 732 | Edison | 20 mi |
| 908 | Edison | 20 mi |
| 718 | Staten Island | 31 mi |
| 347 | Staten Island | 31 mi |
| 929 | Staten Island | 31 mi |
| 465 | Staten Island | 31 mi |
| 917 | Staten Island | 31 mi |
| 862 | Newark | 37 mi |
Princeton quick facts
Princeton was incorporated on January 1, 2013.
Incorporated2013January 1, 2013
CountyMercer CountyNew Jersey
Area code609Population30,451Census ACS estimateZIP codes308540, 08542, 08544Time zoneEastern TimeET
Dates, namesake and elevation from Wikipedia: Princeton, New Jersey and Wikidata (checked 2026-11-08); population and ZIP codes from the U.S. Census Bureau.
Questions
What area code is Princeton?
Princeton uses area code 609. Because more than one area code serves the same area, local calls need all ten digits.
When did area code 609 start?
Area code 609 dates from 1956, when it was split from area code 201.
Do I need to dial the area code for local calls in Princeton?
Yes. 609 share the same area as an overlay, so every local call needs the area code plus the seven-digit number (ten digits).
What time zone is area code 609 in?
Princeton is on Eastern Time (ET).
What other cities use area code 609?
Other cities in this network that share 609 include Atlantic City.
Sources: Area codes 609 and 640 (Wikipedia) and Wikidata, checked 2026-11-08. Numbering plans change; the North American Numbering Plan Administrator is the official record.