Ohio
Postal abbreviation OH. 1,416 ZIP codes across 88 counties.
| Population | 11,810,293 |
|---|---|
| Postal abbreviation | OH |
| ZIP codes | 1,416 ZIP codes → |
| Area codes | 216220234283326330380419436440513567614740937 |
| Time zone | Eastern |
| Counties | 88 |
Largest cities by population
Columbus · 914,802Cleveland · 366,097Cincinnati · 311,224Toledo · 267,463Akron · 189,247Dayton · 136,579Canton · 69,755Lorain · 65,395Hamilton · 63,468Youngstown · 59,331Springfield · 58,190Elyria · 53,035Middletown · 51,617Cuyahoga Falls · 50,909Newark · 50,783Lakewood · 50,007Dublin · 49,294Euclid · 48,823Mansfield · 47,663Mentor · 47,171Strongsville · 45,983Fairfield · 44,828Delaware · 44,589Grove City · 42,517Lancaster · 41,249Reynoldsburg · 41,224Findlay · 40,287Warren · 38,912Westerville · 38,645Hilliard · 38,033
Largest counties by population
Franklin County · 1,333,048Cuyahoga County · 1,245,873Hamilton County · 830,774Summit County · 537,864Montgomery County · 536,096Lucas County · 428,018Butler County · 392,876Stark County · 373,713Lorain County · 317,129Warren County · 250,008
Counties in Ohio
Adams CountyAllen CountyAshland CountyAshtabula CountyAthens CountyAuglaize CountyBelmont CountyBrown CountyButler CountyCarroll CountyChampaign CountyClark CountyClermont CountyClinton CountyColumbiana CountyCoshocton CountyCrawford CountyCuyahoga CountyDarke CountyDefiance CountyDelaware CountyErie CountyFairfield CountyFayette CountyFranklin CountyFulton CountyGallia CountyGeauga CountyGreene CountyGuernsey CountyHamilton CountyHancock CountyHardin CountyHarrison CountyHenry CountyHighland CountyHocking CountyHolmes CountyHuron CountyJackson CountyJefferson CountyKnox CountyLake CountyLawrence CountyLicking CountyLogan CountyLorain CountyLucas CountyMadison CountyMahoning CountyMarion CountyMedina CountyMeigs CountyMercer CountyMiami CountyMonroe CountyMontgomery CountyMorgan CountyMorrow CountyMuskingum CountyNoble CountyOttawa CountyPaulding CountyPerry CountyPickaway CountyPike CountyPortage CountyPreble CountyPutnam CountyRichland CountyRoss CountySandusky CountyScioto CountySeneca CountyShelby CountyStark CountySummit CountyTrumbull CountyTuscarawas CountyUnion CountyVan Wert CountyVinton CountyWarren CountyWashington CountyWayne CountyWilliams CountyWood CountyWyandot County
Population: U.S. Census Bureau, ACS 5-year estimates, 2024.