Ohio Area Codes
15 active area codes · Columbus · Population around 11,860,621
Ohio has 15 active area codes, serving cities like Columbus, Cleveland, and Cincinnati. Of those, 14 are overlays covering ground another code already covers, which is why local calls there use all ten digits. The newest, 436, has been in service since March 1, 2024. Each code below links to its cities, carriers, timezone, and coverage map.
Ohio Area Code Map
What area codes does Ohio have?
- 216ClevelandEastern Time (ET) · 34 cities · 773,371
- 220OverlayNewarkEastern Time (ET) · 307 cities · 1,539,204
- 234OverlayAkronEastern Time (ET) · 179 cities · 2,046,496
- 283OverlayCincinnatiVaries · 139 cities · 1,609,756
- 326OverlayDaytonEastern Time (ET) · 169 cities · 1,433,176
- 330OverlayAkronEastern Time (ET) · 179 cities · 2,046,496
- 380OverlayColumbusEastern Time (ET) · 41 cities · 1,506,672
- 419OverlayToledoEastern Time (ET) · 265 cities · 1,648,605
- 436OverlayParmaEastern Time (ET) · 92 cities · 1,244,619
- 440OverlayParmaEastern Time (ET) · 92 cities · 1,244,619
- 513OverlayCincinnatiEastern Time (ET) · 139 cities · 1,609,756
- 567OverlayToledoEastern Time (ET) · 265 cities · 1,648,605
- 614OverlayColumbusEastern Time (ET) · 41 cities · 1,506,672
- 740OverlayNewarkEastern Time (ET) · 307 cities · 1,539,204
- 937OverlayDaytonEastern Time (ET) · 169 cities · 1,433,176
More than one of these codes covers 88 of the 88 counties in Ohio, and one county is covered by 6 of them. Each card counts the people inside that code's own boundary at the 2020 census. Adding all 15 gives 22,830,427, against the 11,799,448 the same census counts in those counties, because 11,030,979 residents fall inside more than one code.
How many phone prefixes does Ohio use?
The area codes in Ohio hold 6,903 assigned prefixes between them, listed under 129 distinct carrier names. A prefix is the three digits after the area code, and NANPA assigns each one to a single carrier. Two of the 15 codes here — 283 and 436 — are newer than the NANPA extract behind these numbers, so their prefixes are not counted above.
Sources: City populations – U.S. Census Bureau PEP, Vintage 2024 (SUB-IP-EST2024-POP). State populations – the same program, Vintage 2025 (CO-EST2025-ALLDATA). Area-code footprint and county populations – 2020 Census Centers of Population, mapped against NANP area code boundaries. The share of each city inside a code is measured the same way, against Census place boundaries from the Census Bureau's TIGERweb service. Area code assignments – NANPA CO Code data. See our data methodology.
Frequently Asked Questions
How many area codes does Ohio have?
Ohio has 15 active area codes: 216, 220, 234, 283, 326, 330, 380, 419, 436, 440, 513, 567, 614, 740, 937.
What is the main area code for Ohio?
Of the 15 area codes in Ohio, 614 is the oldest one still serving Columbus, its largest city. 614 has been in service since 1947.
What are the largest cities in Ohio?
The largest cities in Ohio include Columbus, Cleveland, Cincinnati, Toledo, Akron.
What is the total population of Ohio?
Ohio has an estimated total population of 11,860,621 based on US Census PEP 2024 data.
Do I have to dial ten digits in Ohio?
In the parts of Ohio covered by an overlay, yes. 14 of the 15 area codes here cover ground another code already covers, and where two codes share an area, local calls need the area code as well as the seven-digit number.
Why does Ohio have 15 area codes?
They arrived one at a time rather than all at once: 614 has been in service since 1947. 14 of the 15 are overlays, laid over a code that already covered the same ground instead of splitting its map in two. The most recent is 436, in service since March 1, 2024.
What is the newest area code in Ohio?
436, in service since March 1, 2024.
Is my county covered by more than one area code in Ohio?
It may be: more than one area code covers 88 of the 88 counties in Ohio, and one county there is covered by 6 of them. The table above shows which codes reach each of the largest cities.