Mount Washington, Ohio Area Code

Mount Washington, OH is officially utilizing an area code overlay in which area codes 283 and 513 serve the same geographic area. Ten digit dialing (area code + seven digit number) is necessary.

In addition to Mount Washington, OH area code information read more about area codes 283 and 513 details and Ohio area codes.

Mount Washington, OH is located in Hamilton County and observes the Eastern Time Zone. View our Times by Area Code tool.