Monmouth Junction, New Jersey Area Code

Monmouth Junction, NJ is officially utilizing an area code overlay in which area codes 732 and 848 serve the same geographic area. Ten digit dialing (area code + seven digit number) is necessary.

In addition to Monmouth Junction, NJ area code information read more about area codes 732 and 848 details and New Jersey area codes.

Monmouth Junction, NJ is located in Middlesex County and observes the Eastern Time Zone. View our Times by Area Code tool.