Ohio County Map

All 88 counties with county seats and major cities

Ohio has 88 counties; the last of them, Noble County, was formed in 1851. This map shows all 88 counties and their county seats. Tap a county for details, or download the free printable map below.

Ohio county map showing all 88 counties with county names and county seats
Map of Ohio counties with county seats (dots) and the state capital, Columbus (star). Boundaries: U.S. Census Bureau, 2025. Free to use with attribution (CC BY 4.0).

Updated October 4, 2026 · Boundaries: U.S. Census Bureau 2025 · Population: Census estimates for July 1, 2025

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Ohio county facts

Number of counties
88
Largest by land area
Ashtabula County 702 sq mi
Smallest by land area
Lake County 229.4 sq mi
Most people
Franklin County 1,361,536
Fewest people
Vinton County 12,645
Fastest growing since 2020
Union County +17%
Highest median household income
Delaware County $133,540
Oldest county
Washington County est. 1788
Newest county
Noble County est. 1851
State capital
Columbus Franklin County

List of 88 Ohio counties

Sorted A–Z. Click a column to sort, or a name to show it on the map. Download as CSV

CountyCounty seatPopulation 2025Change since 2020Land area (sq mi)Median incomeEstablishedFIPS
Adams CountyWest Union27,865+1.4%584$50,264179739001
Allen CountyLima100,881−1.3%403$64,038182039003
Ashland CountyAshland52,523+0.2%423$69,860184639005
Ashtabula CountyJefferson96,713−0.9%702$57,728–39007
Athens CountyAthens63,197+1.2%504$56,001180539009
Auglaize CountyWapakoneta45,909−1.1%401$78,660184839011
Belmont CountySt. Clairsville64,434−3.1%532$57,017180139013
Brown CountyGeorgetown44,397+1.6%490$71,270181839015
Butler CountyHamilton400,128+2.5%467$81,590180339017
Carroll CountyCarrollton26,475−1.1%395$64,835183339019
Champaign CountyUrbana38,820+0.3%429$75,556180539021
Clark CountySpringfield135,340−0.5%396$63,132181839023
Clermont CountyBatavia216,977+4%453$85,510180039025
Clinton CountyWilmington42,301+0.7%409$70,407181039027
Columbiana CountyLisbon99,377−2.5%532$58,180180339029
Coshocton CountyCoshocton37,188+1.6%564$55,577181039031
Crawford CountyBucyrus41,896−0.3%402$58,044182039033
Cuyahoga CountyCleveland1,232,925−2.5%457$64,468180839035
Darke CountyGreenville51,520−0.7%598$64,486180939037
Defiance CountyDefiance38,292+0%411$73,064184539039
Delaware CountyDelaware242,032+13%443$133,540180839041
Erie CountySandusky73,296−3.1%251$71,993183839043
Fairfield CountyLancaster169,752+6.8%504$90,966180039045
Fayette CountyWashington Court House28,552−1.4%406$63,275181039047
Franklin CountyColumbus1,361,536+2.9%532$75,176180339049
Fulton CountyWauseon41,853−2%405$72,864185039051
Gallia CountyGallipolis29,072−0.5%467$56,830180339053
Geauga CountyChardon95,676+0.3%400$107,860180639055
Greene CountyXenia174,322+3.8%414$87,309180339057
Guernsey CountyCambridge38,379−0.2%522$58,478181039059
Hamilton CountyCincinnati838,418+0.9%406$72,470179039061
Hancock CountyFindlay75,034+0.1%531$73,141182039063
Hardin CountyKenton30,072−2%470$62,484182039065
Harrison CountyCadiz14,070−2.9%402$54,414181339067
Henry CountyNapoleon27,598−0.2%416$80,099182039069
Highland CountyHillsboro43,823+1.2%553$65,785180539071
Hocking CountyLogan27,512−1.9%421$62,960181839073
Holmes CountyMillersburg44,970+1.7%423$76,140182439075
Huron CountyNorwalk58,250−0.5%492$67,878180939077
Jackson CountyJackson32,817+0.5%420$57,106181639079
Jefferson CountySteubenville63,597−2.5%408$59,055179739081
Knox CountyMount Vernon64,002+2.1%526$73,878180839083
Lake CountyPainesville232,217−0.1%229$80,925184039085
Lawrence CountyIronton55,710−4.4%453$58,325181539087
Licking CountyNewark185,564+4%682$84,426180839089
Logan CountyBellefontaine46,302+0.3%459$71,551181839091
Lorain CountyElyria323,219+3.3%491$73,347182239093
Lucas CountyToledo423,347−1.8%340$62,224183539095
Madison CountyLondon46,985+7.1%467$87,045181039097
Mahoning CountyYoungstown224,706−1.7%412$56,942184639099
Marion CountyMarion65,115−0.4%404$59,371182039101
Medina CountyMedina185,025+1.4%422$94,968181239103
Meigs CountyPomeroy21,587−2.8%430$46,873181939105
Mercer CountyCelina42,737+0.5%462$76,782182039107
Miami CountyTroy112,634+3.5%407$76,817180739109
Monroe CountyWoodsfield12,994−2.9%456$60,134181339111
Montgomery CountyDayton539,598+0.4%461$66,139180339113
Morgan CountyMcConnelsville13,626−1.3%416$59,351181739115
Morrow CountyMount Gilead36,305+3.9%406$75,283184839117
Muskingum CountyZanesville87,014+0.7%665$60,780180439119
Noble CountyCaldwell14,276+1.2%398$56,098185139121
Ottawa CountyPort Clinton39,481−2.2%255$76,101184039123
Paulding CountyPaulding18,727−0.4%416$67,731182039125
Perry CountyNew Lexington35,918+1.4%408$67,460181839127
Pickaway CountyCircleville62,978+7.6%501$74,040181039129
Pike CountyWaverly27,061−0.1%440$52,736181539131
Portage CountyRavenna163,404+1%488$75,766180739133
Preble CountyEaton40,664−0.8%424$69,223180839135
Putnam CountyOttawa34,380−0.2%483$84,928182039137
Richland CountyMansfield124,893−0%495$59,509180839139
Ross CountyChillicothe76,429−0.9%689$61,303179839141
Sandusky CountyFremont58,655−0.4%408$62,295182039143
Scioto CountyPortsmouth71,365−3.6%610$50,609180339145
Seneca CountyTiffin54,522−1%551$66,025182039147
Shelby CountySidney48,065−0.4%408$73,978181939149
Stark CountyCanton373,771−0.3%575$67,934180839151
Summit CountyAkron538,376−0.4%413$71,622184039153
Trumbull CountyWarren198,972−1.5%618$56,435180039155
Tuscarawas CountyNew Philadelphia92,373−1%568$65,044180839157
Union CountyMarysville73,446+17%432$112,322182039159
Van Wert CountyVan Wert29,013+0.3%409$67,917182039161
Vinton CountyMcArthur12,645−1.2%412$55,336185039163
Warren CountyLebanon257,181+6.1%401$110,132180339165
Washington CountyMarietta58,389−2.3%632$63,603178839167
Wayne CountyWooster116,758−0.1%555$73,574180839169
Williams CountyBryan36,549−1.5%421$61,048182039171
Wood CountyBowling Green134,176+1.5%617$74,216182039173
Wyandot CountyUpper Sandusky21,567−1.6%407$69,768184539175

Ohio county map with cities

The largest cities in Ohio and the counties they are in. Cities that cross a county line list every county, the main one first. To find any smaller town, use the search box above.

Ohio county map with cities and county seats
Ohio counties with county seat towns. Download the full-size image
CityCountyPopulation 2025
ColumbusFranklin, Delaware and Fairfield counties938,396
ClevelandCuyahoga County363,608
CincinnatiHamilton County314,367
ToledoLucas County263,423
AkronSummit County189,691
DaytonMontgomery and Greene counties136,688
ParmaCuyahoga County78,581
CantonStark County69,001
LorainLorain County65,366
HamiltonButler County64,644
YoungstownMahoning and Trumbull counties58,832
SpringfieldClark County58,281
KetteringMontgomery and Greene counties57,396
ElyriaLorain County53,634
MiddletownButler and Warren counties52,146
NewarkLicking County51,473
Cuyahoga FallsSummit County50,975
DublinFranklin, Union and Delaware counties49,094
LakewoodCuyahoga County49,027
BeavercreekGreene County48,134
EuclidCuyahoga County47,962
MansfieldRichland County47,381
MentorLake County47,010
DelawareDelaware County46,636
StrongsvilleCuyahoga County45,629
Grove CityFranklin County45,180
FairfieldButler and Hamilton counties44,682
Huber HeightsMontgomery and Miami counties43,905
Cleveland HeightsCuyahoga County43,750
ReynoldsburgFranklin, Licking and Fairfield counties43,350

Printable Ohio county maps (free PDF, PNG, SVG)

Every map is free to print and share. The PDFs are vector files with real text, so they stay sharp at any size and you can search them for a county name. Use 11×17 (tabloid) for the most readable labels.

Ohio county map with all 88 counties labeled

Color map with names

All 88 counties labeled, county seats marked. Letter and 11×17 PDF, high-resolution PNG, editable SVG.

Ohio county map with cities

Map with cities

Counties with their county seat towns and major cities.

Blank outline map of Ohio counties

Blank outline map

County lines only, no names. For quizzes, coloring and your own notes.

Ohio county map with numbers

Numbered map with key

A number in every county with an alphabetical key.

Black and white Ohio county map

Black and white

Labeled map that prints well on any printer.

Map of Ohio counties shaded by population density

Population map

Counties shaded by population density (2025 estimates).

Data and GIS files

The county table as CSV, and the boundaries as GeoJSON and KML (Google Earth, Google My Maps).

Why does Ohio have 88 counties?

Ohio's first county, Washington, was established by proclamation of Arthur St. Clair, governor of the Northwest Territory, in July 1788. It covered about half of present-day Ohio. Territorial governors created more counties the same way, and ten existed when Ohio became a state in 1803, few of them resembling today's counties. Early county government centered on courts and taxes, and the Ohio Supreme Court had to sit in every county once a year until 1851. The legislature kept dividing the large early counties until Noble County, the 88th, was formed in 1851. The Constitution adopted that year makes further changes hard: no county may be smaller than 400 square miles, and any law creating a county or moving a county line must be approved by the voters of each county affected.

County maps of neighboring states

Ohio counties: questions and answers

How many counties are in Ohio?
Ohio has 88 counties.
What is the largest county in Ohio?
By land area, Ashtabula County is the largest (702 sq mi). By population, Franklin County is the largest, with 1,361,536 people (2025 estimate).
What is the smallest county in Ohio?
Lake County is the smallest by land area (229.4 sq mi). Vinton County has the fewest people: 12,645 (2025 estimate).
What is the wealthiest county in Ohio?
By median household income, Delaware County ranks first with $133,540 (American Community Survey 2020–2024). The lowest is Meigs County at $46,873.
What county is Columbus in?
Columbus is mostly in Franklin County, with smaller parts in Delaware and Fairfield counties.
What county is Cleveland in?
Cleveland is in Cuyahoga County.
What county is Cincinnati in?
Cincinnati is in Hamilton County.
How can I see county lines on Google Maps?
Google Maps does not draw county lines. Download the KML file from the printable maps section above and import it into Google My Maps (Create a new map › Import) or open it in Google Earth to see every Ohio county boundary on top of Google's map.
Can I use this map for free?
Yes. The maps and files on this page are free to print, share and use in your own work, including commercial projects, under the CC BY 4.0 licence. Please credit “WhichCounty (whichcounty.com)”.

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Sources and methodology

Found an error? Tell us. Last data update: October 4, 2026.