Ada, Ohio Area Code

Ada, OH is officially utilizing an area code overlay in which area codes 419 and 567 serve the same geographic area. Ten digit dialing (area code + seven digit number) is necessary.

In addition to Ada, OH area code information read more about area codes 419 and 567 details and Ohio area codes.

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