Ohio Counties by Population (2024)

Population

100K

200K

300K

400K

500K

600K

700K

800K

900K

1M

1.1M

1.2M

1.3M

Hover/click a county for data.

88 counties

County
2024 Pop.
Change (2020)
Area (mi²)
Density (/mi²)
Location
Franklin County1,330,3960.45%2052,501Franklin County location
Cuyahoga County1,229,182-2.64%1762,690Cuyahoga County location
Hamilton County829,395-0.12%1562,048Hamilton County location
Summit County535,697-0.76%1591,297Summit County location
Montgomery County534,118-0.56%1781,159Montgomery County location
Lucas County424,249-1.53%1311,248Lucas County location
Butler County396,3581.4%180849Butler County location
Stark County372,647-0.5%222648Stark County location
Lorain County319,7892.01%190651Lorain County location
Warren County254,5614.66%155635Warren County location
Delaware County236,74610.03%171534Delaware County location
Lake County231,544-0.42%881,011Lake County location
Mahoning County225,270-1.2%159548Mahoning County location
Clermont County213,2652.16%175471Clermont County location
Trumbull County200,020-0.82%239324Trumbull County location
Licking County184,6373.27%263271Licking County location
Medina County184,5951.07%163438Medina County location
Greene County170,3551.32%160411Greene County location
Fairfield County167,7645.22%195333Fairfield County location
Portage County163,5881.07%188336Portage County location
Clark County134,488-1.03%153340Clark County location
Wood County133,6581.06%238217Wood County location
Richland County124,867-0.08%191252Richland County location
Wayne County116,468-0.39%214210Wayne County location
Miami County111,5392.37%157274Miami County location
Allen County100,579-1.51%156250Allen County location
Columbiana County99,795-1.82%205188Columbiana County location
Ashtabula County96,730-0.78%271138Ashtabula County location
Geauga County95,323-0.07%154238Geauga County location
Tuscarawas County91,777-1.52%219162Tuscarawas County location
Muskingum County86,4960.03%257130Muskingum County location
Ross County76,494-0.72%266111Ross County location
Hancock County74,634-0.39%205141Hancock County location
Erie County73,556-2.55%97293Erie County location
Union County72,39814.76%167168Union County location
Scioto County71,749-2.84%235118Scioto County location
Marion County65,093-0.45%156161Marion County location
Athens County64,5313.43%195128Athens County location
Belmont County64,341-2.94%205121Belmont County location
Jefferson County63,779-2.15%157156Jefferson County location
Knox County63,4441.02%203121Knox County location
Pickaway County62,1655.98%193124Pickaway County location
Sandusky County58,851-0.01%157144Sandusky County location
Washington County58,286-2.28%24492Washington County location
Huron County58,179-0.54%190118Huron County location
Lawrence County55,664-4.25%175123Lawrence County location
Seneca County54,520-0.97%21399Seneca County location
Ashland County52,356-0.22%163124Ashland County location
Darke County51,304-1.14%23186Darke County location
Shelby County47,846-0.62%157117Shelby County location
Auglaize County46,154-0.68%155115Auglaize County location
Logan County46,052-0.14%177100Logan County location
Madison County45,6234.05%18098Madison County location
Holmes County44,3970.38%163105Holmes County location
Brown County43,8540.41%18989Brown County location
Highland County43,8021.02%21379Highland County location
Mercer County42,454-0.21%17892Mercer County location
Clinton County41,986-0.1%158103Clinton County location
Fulton County41,856-1.85%156103Fulton County location
Crawford County41,549-1.1%155103Crawford County location
Preble County40,538-1.14%16496Preble County location
Ottawa County39,638-1.63%98155Ottawa County location
Champaign County38,9470.53%16691Champaign County location
Defiance County38,5020.63%15994Defiance County location
Guernsey County38,118-0.79%20173Guernsey County location
Coshocton County37,1231.47%21866Coshocton County location
Williams County36,534-1.47%16387Williams County location
Morrow County35,8542.5%15788Morrow County location
Perry County35,6310.52%15787Perry County location
Putnam County34,068-0.92%18671Putnam County location
Jackson County32,601-0.19%16278Jackson County location
Hardin County30,345-1.24%18165Hardin County location
Gallia County28,942-1%18062Gallia County location
Fayette County28,802-0.6%15771Fayette County location
Van Wert County28,604-1.08%15870Van Wert County location
Adams County27,5830.52%22547Adams County location
Henry County27,514-0.56%16166Henry County location
Hocking County27,262-2.77%16365Hocking County location
Pike County26,990-0.3%17061Pike County location
Carroll County26,8300.48%15268Carroll County location
Meigs County21,573-2.64%16650Meigs County location
Wyandot County21,362-2.3%15752Wyandot County location
Paulding County18,650-0.86%16145Paulding County location
Noble County14,2971.47%15436Noble County location
Harrison County13,967-3.62%15535Harrison County location
Morgan County13,623-1.01%16133Morgan County location
Monroe County13,091-1.94%17629Monroe County location
Vinton County12,371-3.36%15930Vinton County location
  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)

Sources