Mount Vernon, Oregon Area Code

Mount Vernon, OR is officially utilizing an area code overlay in which area codes 458 and 541 serve the same geographic area. Ten digit dialing (area code + seven digit number) is necessary.

In addition to Mount Vernon, OR area code information read more about area codes 458 and 541 details and Oregon area codes.

Mount Vernon, OR is located in Grant County and observes the Pacific Time Zone. View our Times by Area Code tool.