Dillonvale, Ohio Area Code

Dillonvale, OH is officially utilizing two area codes which are area codes 740 and 220.

In addition to Dillonvale, OH area code information read more details about area code 740, area code 220, and Ohio area codes.

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