Map of Ohio Counties

Map of Ohio Counties showing county borders
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Ohio is divided into 88 counties, each functioning as an individual administrative region within the state. Use the interactive maps below to explore counties and their boundaries. Download free maps or learn more about creating a custom map of Ohio to visualize your own data.

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Interactive Map of Ohio Counties

List of Counties (88)

List of 88 counties
#CountyCounty seatYear founded
1AdamsWest Union1797
2AllenLima1820
3AshlandAshland1846
4AshtabulaJefferson1807
5AthensAthens1805
6AuglaizeWapakoneta1848
7BelmontSt. Clairsville1801
8BrownGeorgetown1818
9ButlerHamilton1803
10CarrollCarrollton1833
11ChampaignUrbana1805
12ClarkSpringfield1818
13ClermontBatavia1800
14ClintonWilmington1810
15ColumbianaLisbon1803
16CoshoctonCoshocton1810
17CrawfordBucyrus1820
18CuyahogaCleveland1807
19DarkeGreenville1809
20DefianceDefiance1845
21DelawareDelaware1808
22ErieSandusky1838
23FairfieldLancaster1800
24FayetteWashington Court House1810
25FranklinColumbus1803
26FultonWauseon1850
27GalliaGallipolis1803
28GeaugaChardon1806
29GreeneXenia1803
30GuernseyCambridge1810
31HamiltonCincinnati1790
32HancockFindlay1820
33HardinKenton1820
34HarrisonCadiz1813
35HenryNapoleon1820
36HighlandHillsboro1805
37HockingLogan1818
38HolmesMillersburg1824
39HuronNorwalk1809
40JacksonJackson1816
41JeffersonSteubenville1797
42KnoxMount Vernon1808
43LakePainesville1840
44LawrenceIronton1815
45LickingNewark1808
46LoganBellefontaine1818
47LorainElyria1822
48LucasToledo1835
49MadisonLondon1810
50MahoningYoungstown1846
51MarionMarion1820
52MedinaMedina1812
53MeigsPomeroy1819
54MercerCelina1820
55MiamiTroy1807
56MonroeWoodsfield1813
57MontgomeryDayton1803
58MorganMcConnelsville1817
59MorrowMount Gilead1848
60MuskingumZanesville1804
61NobleCaldwell1851
62OttawaPort Clinton1840
63PauldingPaulding1820
64PerryNew Lexington1818
65PickawayCircleville1810
66PikeWaverly1815
67PortageRavenna1807
68PrebleEaton1808
69PutnamOttawa1820
70RichlandMansfield1808
71RossChillicothe1798
72SanduskyFremont1820
73SciotoPortsmouth1803
74SenecaTiffin1820
75ShelbySidney1819
76StarkCanton1808
77SummitAkron1840
78TrumbullWarren1800
79TuscarawasNew Philadelphia1808
80UnionMarysville1820
81Van WertVan Wert1820
82VintonMcArthur1850
83WarrenLebanon1803
84WashingtonMarietta1788
85WayneWooster1812
86WilliamsBryan1820
87WoodBowling Green1820
88WyandotUpper Sandusky1845

Ohio Counties: Key Facts

  • Total number of counties: 88 (13th highest among all U.S. states)
  • Most populous county: Franklin County (Columbus)
  • Least populous county: Vinton County
  • Largest county by land area: Ashtabula County - 702 square miles
  • Smallest by area: Lake County - 228 square miles
  • Counties with major urban centers: Cuyahoga (Cleveland), Franklin (Columbus), Hamilton (Cincinnati)
  • State capital location: Franklin County (Columbus)
  • Bordering states: Michigan, Indiana, Kentucky, West Virginia, and Pennsylvania
  • Most counties formed in early to mid-1800s

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This map is divided into 88 counties.

Updates

Aug 27, 2025:

  • Improved map quality
  • Added support for surrounding areas and lakes

Aug 26, 2024:

  • Added map of Ohio Counties
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