Mount Holly, New Jersey Area Code
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.
Select Any New Jersey City or Town Alphabetically
Area Codes Look Up By State and City
Area Codes Look Up in Surrounding Places
