Mount Holly, New Jersey Area Code

Mount Holly, NJ Area Codes are

Mount Holly, NJ is officially utilizing two area codes which are area codes 609 and 640.

In addition to Mount Holly, NJ area code information read more details about area code 609, area code 640 and New Jersey area codes.

Mount Holly, NJ is located in Burlington County and observes the Eastern Time Zone. View our Times by Area Code tool.

New Jersey Area Code Map