The Map to the right is now clickable; click on an area code to go to the map for that code.
This is a list of area codes in the State of Ohio, with date of establishment in parentheses:
- 216 Cleveland (October, 1947)
- 234 Akron, Canton, Youngstown, and Warren, overlay with 330 (October 30, 2000)
- 330 Akron, Canton, Youngstown, and Warren, overlay with 234 (March 9, 1996)
- 419 Northwest and north central Ohio including Toledo, Sandusky, and Ashland, overlay with 567 (October, 1947)
- 440 Part of Northeast Ohio including parts of Cleveland (August 16, 1997)
- 513 Southwest Ohio including Cincinnati (October, 1947)
- 567 Northwest and north central Ohio including Toledo, Sandusky, and Ashland, overlay with 419 (January 1, 2002)
- 614 Columbus (October, 1947)
- 740 Central and southeastern Ohio except Columbus (December 6, 1997)
- 937 Southwestern part of Ohio including Springfield, Dayton, public parts of Wright-Patterson Air Force Base, and areas north of Cincinnati (September 28, 1996)
When the first area code plan was introduced in 1947, the state was given area codes 216, 419, 513, and 614. In 1996, 330 and 937 were added as splits. In 1998, 440 and 740 were added as splits. Most recently, in 2000, 234 and 567 were added as overlays. There are currently ten area codes serving Ohio.
An eleventh area code, 380, will cover the Columbus/Central Ohio area. A twelfth area code, 283, will cover the Cincinnati region when 513 is depleted.