New Middletown, Ohio Area Code
New Middletown, OH is officially utilizing an area code overlay in which area codes 234 and 330 serve the same geographic area. Ten digit dialing (area code + seven digit number) is necessary.
In addition to New Middletown, OH area code information read more about area codes 234 and 330 details and Ohio area codes.
New Middletown, OH is located in Mahoning County and observes the Eastern Time Zone. View our Times by Area Code tool.