Ohio County Map

List of Counties in Ohio

CountyFIPS CodeCounty SeatEstablished inPopulationArea (sq mi)Area (km2)
Adams County1West UnionJul 10, 179728,550583.911,512
Allen County3LimaMar 1, 1820106,331404.431,047
Ashland County5AshlandFeb 24, 184653,139424.371,099
Ashtabula County7JeffersonJun 7, 1807101,497702.441,819
Athens County9AthensMar 1, 180564,757506.761,313
Auglaize County11WapakonetaFeb 14, 184845,949401.251,039
Belmont County13St. ClairsvilleSep 7, 180170,400537.351,392
Brown County15GeorgetownMar 1, 181844,846491.761,274
Butler County17HamiltonMay 1, 1803368,130467.271,210
Carroll County19CarrolltonJan 1, 183328,836394.671,022
Champaign County21UrbanaMar 1, 180540,097428.561,110
Clark County23SpringfieldMar 1, 1818138,333399.861,036
Clermont County25BataviaDec 6, 1800197,363451.991,171
Clinton County27WilmingtonMar 1, 181042,040410.881,064
Columbiana County29LisbonMay 1, 1803107,841532.461,379
Coshocton County31CoshoctonJan 31, 181036,901564.071,461
Crawford County33BucyrusApr 1, 182043,784402.111,041
Cuyahoga County35ClevelandJun 7, 18071,249,352458.491,187
Darke County37GreenvilleJan 3, 180952,959599.81,553
Defiance County39DefianceApr 7, 184539,037411.161,065
Delaware County41DelawareApr 1, 1808174,214442.411,146
Erie County43SanduskyMar 15, 183877,079254.88660
Fairfield County45LancasterDec 9, 1800146,156505.111,308
Fayette County47Washington Court HouseMar 1, 181029,030406.581,053
Franklin County49ColumbusApr 30, 18031,264,518539.871,398
Fulton County51WauseonApr 1, 185042,698406.781,054
Gallia County53GallipolisApr 30, 180330,934468.781,214
Geauga County55ChardonMar 1, 180693,389403.661,045
Greene County57XeniaMay 1, 1803161,573414.881,075
Guernsey County59CambridgeMar 1, 181040,087521.91,352
Hamilton County61CincinnatiJan 2, 1790802,374407.361,055
Hancock County63FindlayApr 1, 182074,782531.351,376
Hardin County65KentonApr 1, 182032,058470.291,218
Harrison County67CadizFeb 1, 181315,864403.531,045
Henry County69NapoleonApr 1, 182028,215416.51,079
Highland County71HillsboroMay 1, 180543,589553.281,433
Hocking County73LoganMar 1, 181829,380422.751,095
Holmes County75MillersburgJan 20, 182442,366422.991,096
Huron County77NorwalkMar 7, 180959,626492.691,276
Jackson County79JacksonMar 1, 181633,225420.281,089
Jefferson County81SteubenvilleJul 29, 179769,709409.611,061
Knox County83Mount VernonMar 1, 180860,921527.121,365
Lake County85PainesvilleMar 6, 1840230,041228.21591
Lawrence County87IrontonDec 21, 181562,450454.961,178
Licking County89NewarkMar 1, 1808166,492686.51,778
Logan County91BellefontaineMar 1, 181845,858458.441,187
Lorain County93ElyriaDec 26, 1822301,356492.51,276
Lucas County95ToledoJun 20, 1835441,815340.46882
Madison County97LondonMar 1, 181043,435465.441,205
Mahoning County99YoungstownMar 1, 1846238,823415.251,075
Marion County101MarionApr 1, 182066,501403.841,046
Medina County103MedinaFeb 18, 1812176,3954231,096
Meigs County105PomeroyApr 1, 181923,770429.421,112
Mercer County107CelinaApr 1, 182040,814463.271,200
Miami County109TroyMar 1, 1807102,506407.041,054
Monroe County111WoodsfieldJan 29, 181314,642455.541,180
Montgomery County113DaytonMay 1, 1803535,153461.681,196
Morgan County115McConnelsvilleDec 29, 181715,054417.661,082
Morrow County117Mount GileadMar 1, 184834,827406.221,052
Muskingum County119ZanesvilleMar 1, 180486,074664.631,721
Noble County121CaldwellApr 1, 185114,6453991,033
Ottawa County123Port ClintonMar 6, 184041,428254.95660
Paulding County125PauldingApr 1, 182019,614416.261,078
Perry County127New LexingtonMar 1, 181836,058409.781,061
Pickaway County129CirclevilleMar 1, 181055,698501.911,300
Pike County131WaverlyFeb 1, 181528,709441.491,143
Portage County133RavennaJun 7, 1807161,419492.391,275
Preble County135EatonMar 1, 180842,270424.81,100
Putnam County137OttawaApr 1, 182034,499483.871,253
Richland County139MansfieldMar 1, 1808124,475496.881,287
Ross County141ChillicotheAug 20, 179878,064688.411,783
Sandusky County143FremontApr 1, 182060,944409.181,060
Scioto County145PortsmouthMay 1, 180379,499612.271,586
Seneca County147TiffinApr 1, 182056,745550.591,426
Shelby County149SidneyApr 1, 181949,423409.271,060
Stark County151CantonFeb 13, 1808375,586576.141,492
Summit County153AkronMar 3, 1840541,781419.381,086
Trumbull County155WarrenJul 10, 1800210,312616.481,597
Tuscarawas County157New PhiladelphiaMar 15, 180892,582567.581,470
Union County159MarysvilleApr 1, 182052,300436.651,131
Van Wert County161Van WertApr 1, 182028,744410.091,062
Vinton County163McArthurMar 23, 185013,435414.081,072
Warren County165LebanonMay 1, 1803212,693399.631,035
Washington County167MariettaJul 27, 178861,778635.151,645
Wayne County169WoosterMar 1, 1808114,520555.361,438
Williams County171BryanApr 1, 182037,642421.741,092
Wood County173Bowling GreenApr 1, 1820125,488617.321,599
Wyandot County175Upper SanduskyFeb 3, 184522,615405.611,051