Ohio Counties Map

Ohio (OH) on the US Map

The State of Ohio highlighted on the US map.
State of Ohio highlighted on the US map.

Below is a map of the 88 counties of Ohio (you can click on the map to enlarge it and to see the major city in each state).

Colorful Ohio counties map showing counties, main cities, and neighboring counties.
Ohio counties map with cities.

Interactive Map of Ohio Counties

Click on any of the counties on the map to see the county’s population, economic data, time zone, and zip code (the data will appear below the map). Data is sourced from the US Census 2021.

List of the Counties of New Ohio:

CountyPopulationPer sq. kmLargest City
Adams County27,56418.23West Union
Allen County102,46298.28Lima
Ashland County52,65848.07Ashland
Ashtabula County97,86953.82Ashtabula
Athens County62,93348.25Athens
Auglaize County46,28244.52Wapakoneta
Belmont County67,07748.67Martins Ferry
Brown County43,69434.46Georgetown
Butler County387,830320.97Middletown
Carroll County26,86626.29Minerva
Champaign County38,67834.81Urbana
Clark County136,032132.34Springfield
Clermont County207,650177.16Loveland
Clinton County42,04639.72Wilmington
Columbiana County102,33174.28Salem
Coshocton County36,62125.07Coshocton
Crawford County41,93940.3Bucyrus
Cuyahoga County1,263,6671067.13Cleveland
Darke County51,83933.46Greenville
Defiance County38,32935.97Defiance
Delaware County211,121183.94Columbus
Erie County75,560116.1Sandusky
Fairfield County157,622120.66Columbus
Fayette County28,89727.46Washington Court House
Franklin County1,313,598952.6Columbus
Fulton County42,70940.67Wauseon
Gallia County29,36924.31Gallipolis
Geauga County95,40892.02Bainbridge
Greene County167,043155.95Kettering
Guernsey County38,54228.49Cambridge
Hamilton County826,790787.4Cincinnati
Hancock County75,13954.6Findlay
Hardin County30,73825.24Kenton
Harrison County14,62314.03Cadiz
Henry County27,61825.63Napoleon
Highland County43,16230.13Hillsboro
Hocking County28,18025.82Logan
Holmes County44,16640.35Millersburg
Huron County58,58345.95Norwalk
Jackson County32,53129.88Jackson
Jefferson County65,62062.08Steubenville
Knox County62,39945.85Mount Vernon
Lake County232,202391.04Mentor
Lawrence County58,57049.88Ironton
Licking County177,454100.4Newark
Logan County45,99738.73Bellefontaine
Lorain County311,737245.37Lorain
Lucas County431,212490.17Toledo
Madison County43,94736.43London
Mahoning County229,044214.91Youngstown
Marion County65,51562.64Marion
Medina County181,448166.23Brunswick
Meigs County22,36120.07Middleport
Mercer County42,15435.19Celina
Miami County107,899102.48Huber Heights
Monroe County13,51411.45Woodsfield
Montgomery County536,136448.69Dayton
Morgan County13,95512.94McConnelsville
Morrow County34,89233.17Galion
Muskingum County86,34650.17Zanesville
Noble County14,16613.74Caldwell
Ottawa County40,47961.36Port Clinton
Paulding County18,85817.48Paulding
Perry County35,43933.54New Lexington
Pickaway County58,45845.03Circleville
Pike County27,27123.92Waverly
Portage County161,897128.25Kent
Preble County41,02737.34Eaton
Putnam County34,39527.52Ottawa
Richland County124,50497.07Mansfield
Ross County77,20543.25Chillicothe
Sandusky County59,01355.81Fremont
Scioto County74,39247.08Portsmouth
Seneca County55,16638.65Tiffin
Shelby County48,30745.75Sidney
Stark County374,712251.5Canton
Summit County540,567505.61Akron
Trumbull County202,199126.31Youngstown
Tuscarawas County93,02563.3New Philadelphia
Union County61,76955.24Dublin
Van Wert County28,80827.19Van Wert
Vinton County12,85312.03McArthur
Warren County239,556230.41Middletown
Washington County59,94236.62Marietta
Wayne County116,85881.33Wooster
Williams County37,02633.98Bryan
Wood County131,93082.54Bowling Green
Wyandot County21,93320.81Upper Sandusky