Jersey City, NJ utilizes an area code overlay in which area codes 201 and 551 serve the same geographic area. Ten digit dialing (area code + seven digit number) is necessary.
In addition to Jersey City, NJ area code information read more about area codes 201 and 551 details and New Jersey area codes.
Jersey City, NJ is located in Hudson County and observes the Eastern Time Zone. View our Times by Area Code tool.