Hillsboro, Oregon Area Code
Hillsboro, OR is officially utilizing an area code overlay in which area codes 503 and 971 serve the same geographic area. Ten digit dialing (area code + seven digit number) is necessary.
In addition to Hillsboro, OR area code information read more about area codes 503 and 971 details and Oregon area codes.
Hillsboro, OR is located in Washington County and observes the Pacific Time Zone. View our Times by Area Code tool.