County
|
FIPS Code
[2] |
County Seat
[3] |
Created
[3][4] |
Origin
[5] |
Etymology
[4][5] |
Population
[2][3] |
Area
[3] |
Map
|
| Adams County |
001 |
West Union |
July 10, 1797 |
Hamilton County |
John Adams (1735-1826), President when the county was organized |
&0000000000027330.00000027,330 |
&0000000000000583.910000583.91 sq mi
(&0000000000001512.0000001,512 km²) |
 |
| Allen County |
003 |
Lima |
March 1, 1820 |
Shelby County |
John Allen (1771/2-1813), a War of 1812 officer[6] |
&0000000000108473.000000108,473 |
&0000000000000404.430000404.43 sq mi
(&0000000000001047.0000001,047 km²) |
 |
| Ashland County |
005 |
Ashland |
February 24, 1846 |
Wayne, Richland, Huron, and Lorain Counties |
Ashland, home of Henry Clay and county seat. |
&0000000000052523.00000052,523 |
&0000000000000424.370000424.37 sq mi
(&0000000000001099.0000001,099 km²) |
 |
| Ashtabula County |
007 |
Jefferson |
June 7, 1807 |
Trumbull and Geauga Counties |
Ashtabula River, which means "fish river" in an Algonquian language[7] |
&0000000000102728.000000102,728 |
&0000000000000702.440000702.44 sq mi
(&0000000000001819.0000001,819 km²) |
 |
| Athens County |
009 |
Athens |
March 1, 1805 |
Washington County |
Athens, Greece |
&0000000000062223.00000062,223 |
&0000000000000506.760000506.76 sq mi
(&0000000000001313.0000001,313 km²) |
 |
| Auglaize County |
011 |
Wapakoneta |
February 14, 1848 |
Allen, Mercer, Darke, Hardin, Logan, Shelby, and Van Wert Counties |
Auglaize River, which means "fallen timbers river" to the Shawnee |
&0000000000046611.00000046,611 |
&0000000000000401.250000401.25 sq mi
(&0000000000001039.0000001,039 km²) |
 |
| Belmont County |
013 |
St. Clairsville |
September 7, 1801 |
Jefferson and Washington Counties |
Belle monte, which means "beautiful mountain" in French |
&0000000000070226.00000070,226 |
&0000000000000537.350000537.35 sq mi
(&0000000000001392.0000001,392 km²) |
 |
| Brown County |
015 |
Georgetown |
March 1, 1818 |
Adams and Clermont Counties |
General Jacob Brown (1775-1828), an officer of the War of 1812 |
&0000000000042285.00000042,285 |
&0000000000000491.760000491.76 sq mi
(&0000000000001274.0000001,274 km²) |
 |
| Butler County |
017 |
Hamilton |
May 1, 1803 |
Hamilton County |
General Richard Butler (1743-1791), killed at the Battle of the Wabash |
&0000000000332807.000000332,807 |
&0000000000000467.270000467.27 sq mi
(&0000000000001210.0000001,210 km²) |
 |
| Carroll County |
019 |
Carrollton |
January 1, 1833 |
Columbiana, Stark, Harrison, Jefferson, and Tuscarawas Counties |
Charles Carroll (1737-1832), last surviving signer of the Declaration of Independence |
&0000000000028836.00000028,836 |
&0000000000000394.670000394.67 sq mi
(&0000000000001022.0000001,022 km²) |
 |
| Champaign County |
021 |
Urbana |
March 1, 1805 |
Greene and Franklin Counties |
French for "a plain", describing the land in the area |
&0000000000038890.00000038,890 |
&0000000000000428.560000428.56 sq mi
(&0000000000001110.0000001,110 km²) |
 |
| Clark County |
023 |
Springfield |
March 1, 1818 |
Champaign, Madison, and Greene Counties |
General George Rogers Clark (1752-1818), defeated the Shawnee Indians in a battle near the Springfield area |
&0000000000144742.000000144,742 |
&0000000000000399.860000399.86 sq mi
(&0000000000001036.0000001,036 km²) |
 |
| Clermont County |
025 |
Batavia |
December 6, 1800 |
Hamilton County |
French for "clear mountain" |
&0000000000177977.000000177,977 |
&0000000000000451.990000451.99 sq mi
(&0000000000001171.0000001,171 km²) |
 |
| Clinton County |
027 |
Wilmington |
March 1, 1810 |
Highland and Warren Counties |
George Clinton (1739-1812), vice-president when the county was organized |
&0000000000040543.00000040,543 |
&0000000000000410.880000410.88 sq mi
(&0000000000001064.0000001,064 km²) |
 |
| Columbiana County |
029 |
Lisbon |
May 1, 1803 |
Jefferson and Washington Counties |
Derived from the words Christopher Columbus and Anna |
&0000000000112075.000000112,075 |
&0000000000000532.460000532.46 sq mi
(&0000000000001379.0000001,379 km²) |
 |
| Coshocton County |
031 |
Coshocton |
January 31, 1810 |
Muskingum and Tuscarawas Counties |
Delaware Indian word meaning "union of waters" |
&0000000000036655.00000036,655 |
&0000000000000564.070000564.07 sq mi
(&0000000000001461.0000001,461 km²) |
 |
| Crawford County |
033 |
Bucyrus |
April 1, 1820 |
Delaware County |
Colonel William Crawford (1732-1782), Revolutionary War officer |
&0000000000046966.00000046,966 |
&0000000000000402.110000402.11 sq mi
(&0000000000001041.0000001,041 km²) |
 |
| Cuyahoga County |
035 |
Cleveland |
June 7, 1807 |
Geauga County |
Cuyahoga River, which means "crooked river" in an Iroquoian language[8] |
&0000000001393978.0000001,393,978 |
&0000000000000458.490000458.49 sq mi
(&0000000000001187.0000001,187 km²) |
 |
| Darke County |
037 |
Greenville |
January 3, 1809 |
Miami County |
General William Darke (1736-1801), Revolutionary War officer |
&0000000000053309.00000053,309 |
&0000000000000599.800000599.80 sq mi
(&0000000000001553.0000001,553 km²) |
 |
| Defiance County |
039 |
Defiance |
April 7, 1845 |
Williams, Henry, and Paulding Counties |
Fort Defiance, built in 1794 by General Anthony Wayne |
&0000000000039500.00000039,500 |
&0000000000000411.160000411.16 sq mi
(&0000000000001065.0000001,065 km²) |
 |
| Delaware County |
041 |
Delaware |
April 1, 1808 |
Franklin County |
Delaware Indians |
&0000000000110106.000000110,106 |
&0000000000000442.410000442.41 sq mi
(&0000000000001146.0000001,146 km²) |
 |
| Erie County |
043 |
Sandusky |
March 15, 1838 |
Huron and Sandusky Counties |
Erie Indians |
&0000000000079551.00000079,551 |
&0000000000000254.880000254.88 sq mi
(&0000000000000660.000000660 km²) |
 |
| Fairfield County |
045 |
Lancaster |
December 9, 1800 |
Ross and Washington Counties |
Named for the beauty of its "fair fields" |
&0000000000122759.000000122,759 |
&0000000000000505.110000505.11 sq mi
(&0000000000001308.0000001,308 km²) |
 |
| Fayette County |
047 |
Washington Court House |
March 1, 1810 |
Ross and Highland Counties |
Marquis de Lafayette, French military officer and aristocrat who participated in both the American and French revolutions. |
&0000000000028433.00000028,433 |
&0000000000000406.580000406.58 sq mi
(&0000000000001053.0000001,053 km²) |
 |
| Franklin County |
049 |
Columbus |
April 30, 1803 |
Ross and Wayne Counties |
Benjamin Franklin (1706-1791) - Founding Father, author, printer, satirist, political theorist, scientist, inventor and statesman. |
&0000000001068978.0000001,068,978 |
&0000000000000539.870000539.87 sq mi
(&0000000000001398.0000001,398 km²) |
 |
| Fulton County |
051 |
Wauseon |
April 1, 1850 |
Lucas, Henry, and Williams Counties |
Robert Fulton (1765 – 1815), inventor of the steamboat |
&0000000000042084.00000042,084 |
&0000000000000406.780000406.78 sq mi
(&0000000000001054.0000001,054 km²) |
 |
| Gallia County |
053 |
Gallipolis |
April 30, 1803 |
Washington and Adams Counties |
Gaul, the ancient name of France |
&0000000000031069.00000031,069 |
&0000000000000468.780000468.78 sq mi
(&0000000000001214.0000001,214 km²) |
 |
| Geauga County |
055 |
Chardon |
March 1, 1806 |
Trumbull County |
A Native American word meaning "raccoon" |
&0000000000090895.00000090,895 |
&0000000000000403.660000403.66 sq mi
(&0000000000001045.0000001,045 km²) |
 |
| Greene County |
057 |
Xenia |
May 1, 1803 |
Hamilton and Ross Counties |
General Nathanael Greene (1742-1786), Revolutionary War officer |
&0000000000147886.000000147,886 |
&0000000000000414.880000414.88 sq mi
(&0000000000001075.0000001,075 km²) |
 |
| Guernsey County |
059 |
Cambridge |
March 1, 1810 |
Belmont and Muskingum Counties |
Island of Guernsey, from where most of the settlers originated |
&0000000000040792.00000040,792 |
&0000000000000521.900000521.90 sq mi
(&0000000000001352.0000001,352 km²) |
 |
| Hamilton County |
061 |
Cincinnati |
January 2, 1790 |
One of the original counties |
Alexander Hamilton (1755/7-1804(, Secretary of the Treasury when the county was organized |
&0000000000845303.000000845,303 |
&0000000000000407.360000407.36 sq mi
(&0000000000001055.0000001,055 km²) |
 |
| Hancock County |
063 |
Findlay |
April 1, 1820 |
Logan County |
John Hancock (1737-1793), president of the Continental Congress |
&0000000000071295.00000071,295 |
&0000000000000531.350000531.35 sq mi
(&0000000000001376.0000001,376 km²) |
 |
| Hardin County |
065 |
Kenton |
April 1, 1820 |
Logan County |
General John Hardin (1753–1792), Revolutionary War officer |
&0000000000031945.00000031,945 |
&0000000000000470.290000470.29 sq mi
(&0000000000001218.0000001,218 km²) |
 |
| Harrison County |
067 |
Cadiz |
February 1, 1813 |
Jefferson and Tuscarawas Counties |
General William Henry Harrison (1773–1841), an officer of the War of 1812 |
&0000000000015856.00000015,856 |
&0000000000000403.530000403.53 sq mi
(&0000000000001045.0000001,045 km²) |
 |
| Henry County |
069 |
Napoleon |
April 1, 1820 |
Shelby County |
Patrick Henry (1736–1799), Revolutionary War officer |
&0000000000029210.00000029,210 |
&0000000000000416.500000416.50 sq mi
(&0000000000001079.0000001,079 km²) |
 |
| Highland County |
071 |
Hillsboro |
May 1, 1805 |
Ross, Adams, and Clermont Counties |
Descriptive of the county's terrain |
&0000000000040875.00000040,875 |
&0000000000000553.280000553.28 sq mi
(&0000000000001433.0000001,433 km²) |
 |
| Hocking County |
073 |
Logan |
March 1, 1818 |
Athens, Ross, and Fairfield Counties |
Possibly derived from the Delaware Indian word "Hoch-Hoch-ing", meaning "bottle" |
&0000000000028241.00000028,241 |
&0000000000000422.750000422.75 sq mi
(&0000000000001095.0000001,095 km²) |
 |
| Holmes County |
075 |
Millersburg |
January 20, 1824 |
Coshocton, Wayne, and Tuscarawas Counties |
Major Andrew Holmes (d. 1814), a War of 1812 officer |
&0000000000038943.00000038,943 |
&0000000000000422.990000422.99 sq mi
(&0000000000001096.0000001,096 km²) |
 |
| Huron County |
077 |
Norwalk |
March 7, 1809 |
Portage and Cuyahoga Counties |
Huron Indians |
&0000000000059847.00000059,847 |
&0000000000000492.690000492.69 sq mi
(&0000000000001276.0000001,276 km²) |
 |
| Jackson County |
079 |
Jackson |
March 1, 1816 |
Scioto, Gallia, Athens, and Ross Counties |
General Andrew Jackson (1767–1845) |
&0000000000032641.00000032,641 |
&0000000000000420.280000420.28 sq mi
(&0000000000001089.0000001,089 km²) |
 |
| Jefferson County |
081 |
Steubenville |
July 29, 1797 |
Washington County |
Thomas Jefferson (1743–1826), Vice-President when the county was organized |
&0000000000073894.00000073,894 |
&0000000000000409.610000409.61 sq mi
(&0000000000001061.0000001,061 km²) |
 |
| Knox County |
083 |
Mount Vernon |
March 1, 1808 |
Fairfield County |
General Henry Knox, the first Secretary of War |
&0000000000054500.00000054,500 |
&0000000000000527.120000527.12 sq mi
(&0000000000001365.0000001,365 km²) |
 |
| Lake County |
085 |
Painesville |
March 6, 1840 |
Geauga and Cuyahoga Counties |
Named as such due to it bordering Lake Erie |
&0000000000227511.000000227,511 |
&0000000000000228.210000228.21 sq mi
(&0000000000000591.000000591 km²) |
 |
| Lawrence County |
087 |
Ironton |
December 21, 1815 |
Gallia and Scioto Counties |
Captain James Lawrence (1781–1813), naval hero in the War of 1812 |
&0000000000062319.00000062,319 |
&0000000000000454.960000454.96 sq mi
(&0000000000001178.0000001,178 km²) |
 |
| Licking County |
089 |
Newark |
March 1, 1808 |
Fairfield County |
Named for the salt licks in the area |
&0000000000145491.000000145,491 |
&0000000000000686.500000686.50 sq mi
(&0000000000001778.0000001,778 km²) |
 |
| Logan County |
091 |
Bellefontaine |
March 1, 1818 |
Champaign County |
General Benjamin Logan (c.1742–1802) , who destroyed Shawnee Indian towns in the county |
&0000000000046005.00000046,005 |
&0000000000000458.440000458.44 sq mi
(&0000000000001187.0000001,187 km²) |
 |
| Lorain County |
093 |
Elyria |
December 26, 1822 |
Huron, Cuyahoga, and Medina Counties |
Province of Lorraine, France |
&0000000000284664.000000284,664 |
&0000000000000492.500000492.50 sq mi
(&0000000000001276.0000001,276 km²) |
 |
| Lucas County |
095 |
Toledo |
June 20, 1835 |
Wood, Sandusky, and Huron Counties |
Robert Lucas (1781–1853), Governor of Ohio when the county was created |
&0000000000455054.000000455,054 |
&0000000000000340.460000340.46 sq mi
(&0000000000000882.000000882 km²) |
 |
| Madison County |
097 |
London |
March 1, 1810 |
Franklin County |
President James Madison (1751-1836) |
&0000000000040213.00000040,213 |
&0000000000000465.440000465.44 sq mi
(&0000000000001205.0000001,205 km²) |
 |
| Mahoning County |
099 |
Youngstown |
March 1, 1846 |
Columbiana and Trumbull Counties |
Mahoning River, a Native American word meaning "at the licks" |
&0000000000257555.000000257,555 |
&0000000000000415.250000415.25 sq mi
(&0000000000001075.0000001,075 km²) |
 |
| Marion County |
101 |
Marion |
April 1, 1820 |
Delaware County |
General Francis Marion (1732-1795), lieutenant colonel in the Continental Army and later brigadier general in the American Revolutionary War. |
&0000000000066217.00000066,217 |
&0000000000000403.840000403.84 sq mi
(&0000000000001046.0000001,046 km²) |
 |
| Medina County |
103 |
Medina |
February 18, 1812 |
Portage County |
Medina, capital of the Al Madinah Province in western Saudi Arabia |
&0000000000151095.000000151,095 |
&0000000000000421.550000421.55 sq mi
(&0000000000001092.0000001,092 km²) |
 |
| Meigs County |
105 |
Pomeroy |
April 1, 1819 |
Gallia and Athens Counties |
Return Jonathan Meigs, Jr. (1764-1825), Governor of Ohio and Postmaster General at the time the county was organized |
&0000000000023072.00000023,072 |
&0000000000000429.420000429.42 sq mi
(&0000000000001112.0000001,112 km²) |
 |
| Mercer County |
107 |
Celina |
April 1, 1820 |
Darke County |
General Hugh Mercer (1726-1777), a Revolutionary War officer |
&0000000000040924.00000040,924 |
&0000000000000463.270000463.27 sq mi
(&0000000000001200.0000001,200 km²) |
 |
| Miami County |
109 |
Troy |
March 1, 1807 |
Montgomery County |
Miami Indians |
&0000000000098868.00000098,868 |
&0000000000000407.040000407.04 sq mi
(&0000000000001054.0000001,054 km²) |
 |
| Monroe County |
111 |
Woodsfield |
January 29, 1813 |
Belmont, Washington, and Guernsey Counties |
James Monroe (1758-1831), Secretary of State when the county was organized |
&0000000000015180.00000015,180 |
&0000000000000455.540000455.54 sq mi
(&0000000000001180.0000001,180 km²) |
 |
| Montgomery County |
113 |
Dayton |
May 1, 1803 |
Hamilton and Wayne Counties |
General Richard Montgomery (1738-1775), a Revolutionary War officer |
&0000000000559062.000000559,062 |
&0000000000000461.680000461.68 sq mi
(&0000000000001196.0000001,196 km²) |
 |
| Morgan County |
115 |
McConnelsville |
December 29, 1817 |
Washington, Guernsey, and Muskingum Counties |
General Daniel Morgan (c.1735–1802), a Revolutionary War officer |
&0000000000014897.00000014,897 |
&0000000000000417.660000417.66 sq mi
(&0000000000001082.0000001,082 km²) |
 |
| Morrow County |
117 |
Mount Gilead |
March 1, 1848 |
Knox, Marion, Delaware, and Richland Counties |
Jeremiah Morrow (1771–1852), Governor of Ohio |
&0000000000031628.00000031,628 |
&0000000000000406.220000406.22 sq mi
(&0000000000001052.0000001,052 km²) |
 |
| Muskingum County |
119 |
Zanesville |
March 1, 1803 |
Washington and Fairfield Counties |
A Native American word meaning "A town by the river"
or
a Native American word meaning "by the river side" |
&0000000000084585.00000084,585 |
&0000000000000664.630000664.63 sq mi
(&0000000000001721.0000001,721 km²) |
 |
| Noble County |
121 |
Caldwell |
April 1, 1851 |
Monroe, Washington, Morgan, and Guernsey Counties |
James Noble (1785–1831), an early settler |
&0000000000014058.00000014,058 |
&0000000000000399.000000399.00 sq mi
(&0000000000001033.0000001,033 km²) |
 |
| Ottawa County |
123 |
Port Clinton |
March 6, 1840 |
Erie, Sandusky, and Lucas Counties |
Named for the Ottawa Indians; Ottawa means "trader" in their language |
&0000000000040985.00000040,985 |
&0000000000000254.950000254.95 sq mi
(&0000000000000660.000000660 km²) |
 |
| Paulding County |
125 |
Paulding |
April 1, 1820 |
Darke County |
John Paulding (1758–1818), captor of spy John André during the Revolutionary War |
&0000000000020293.00000020,293 |
&0000000000000416.260000416.26 sq mi
(&0000000000001078.0000001,078 km²) |
 |
| Perry County |
127 |
New Lexington |
March 1, 1818 |
Washington, Fairfield, and Muskingum Counties |
Commodore Oliver Hazard Perry (1785–1819), a naval officer of the War of 1812 |
&0000000000034078.00000034,078 |
&0000000000000409.780000409.78 sq mi
(&0000000000001061.0000001,061 km²) |
 |
| Pickaway County |
129 |
Circleville |
March 1, 1810 |
Ross, Fairfield, and Franklin Counties |
A misspelling of the Piqua tribe, a branch of the Shawnee
or
A variant of a Native American word "Piqua" |
&0000000000052727.00000052,727 |
&0000000000000501.910000501.91 sq mi
(&0000000000001300.0000001,300 km²) |
 |
| Pike County |
131 |
Waverly |
February 1, 1815 |
Ross, Scioto, and Adams Counties |
General Zebulon M. Pike (1779–1813), a Revolutionary War officer and discoverer of Pike's Peak in Colorado in 1806 |
&0000000000027695.00000027,695 |
&0000000000000441.490000441.49 sq mi
(&0000000000001143.0000001,143 km²) |
 |
| Portage County |
133 |
Ravenna |
June 7, 1807 |
Trumbull County |
Derived from an Indian portage |
&0000000000152061.000000152,061 |
&0000000000000492.390000492.39 sq mi
(&0000000000001275.0000001,275 km²) |
 |
| Preble County |
135 |
Eaton |
March 1, 1808 |
Montgomery and Butler Counties |
Captain Edward Preble (1761-1807), a Naval commander in the Revolutionary War |
&0000000000042337.00000042,337 |
&0000000000000424.800000424.80 sq mi
(&0000000000001100.0000001,100 km²) |
 |
| Putnam County |
137 |
Ottawa |
April 1, 1820 |
Shelby County |
General Israel Putnam (1718–1790), a Revolutionary War officer |
&0000000000034726.00000034,726 |
&0000000000000483.870000483.87 sq mi
(&0000000000001253.0000001,253 km²) |
 |
| Richland County |
139 |
Mansfield |
March 1, 1808 |
Fairfield County |
Descriptive of the soil in the area |
&0000000000128852.000000128,852 |
&0000000000000496.880000496.88 sq mi
(&0000000000001287.0000001,287 km²) |
 |
| Ross County |
141 |
Chillicothe |
August 20, 1798 |
Adams and Washington Counties |
Named for James Ross by territorial governor Arthur St. Clair |
&0000000000073345.00000073,345 |
&0000000000000688.410000688.41 sq mi
(&0000000000001783.0000001,783 km²) |
 |
| Sandusky County |
143 |
Fremont |
April 1, 1820 |
Huron County |
An Iroquois word meaning "cold water" |
&0000000000061792.00000061,792 |
&0000000000000409.180000409.18 sq mi
(&0000000000001060.0000001,060 km²) |
 |
| Scioto County |
145 |
Portsmouth |
May 1, 1803 |
Adams County |
Scioto River; Scioto is a Wyandot word meaning "deer" |
&0000000000079195.00000079,195 |
&0000000000000612.270000612.27 sq mi
(&0000000000001586.0000001,586 km²) |
 |
| Seneca County |
147 |
Tiffin |
April 1, 1820 |
Huron County |
Seneca Indians, who had a reservation in the county area at the time |
&0000000000058683.00000058,683 |
&0000000000000550.590000550.59 sq mi
(&0000000000001426.0000001,426 km²) |
 |
| Shelby County |
149 |
Sidney |
April 1, 1819 |
Miami County |
General Isaac Shelby (1750–1826), a Revolutionary War officer and Governor of Kentucky, |
&0000000000047910.00000047,910 |
&0000000000000409.270000409.27 sq mi
(&0000000000001060.0000001,060 km²) |
 |
| Stark County |
151 |
Canton |
February 13, 1808 |
Columbiana County |
General John Stark (1728–1822) , a Revolutionary War officer; known as the "Hero of Bennington" for his exemplary service at the Battle of Bennington in 1777 |
&0000000000378098.000000378,098 |
&0000000000000576.140000576.14 sq mi
(&0000000000001492.0000001,492 km²) |
 |
| Summit County |
153 |
Akron |
March 3, 1840 |
Medina, Portage, and Stark Counties |
Derived from having the highest elevation along the Ohio Canal |
&0000000000542899.000000542,899 |
&0000000000000412.720000412.72 sq mi
(&0000000000001069.0000001,069 km²) |
 |
| Trumbull County |
155 |
Warren |
July 10, 1800 |
One of the original counties |
Jonathan Trumbull (1710-1785), Governor of Connecticut when the county was organized |
&0000000000225116.000000225,116 |
&0000000000000616.480000616.48 sq mi
(&0000000000001597.0000001,597 km²) |
 |
| Tuscarawas County |
157 |
New Philadelphia |
March 15, 1808 |
Muskingum County |
Tuscarawas River, meaning "open mouth river"
or
the Tuscarawas tribe who lived on the river |
&0000000000090914.00000090,914 |
&0000000000000567.580000567.58 sq mi
(&0000000000001470.0000001,470 km²) |
 |
| Union County |
159 |
Marysville |
April 1, 1820 |
Delaware, Franklin, Logan, and Madison Counties |
Named as such due to it formed by a union of four counties |
&0000000000040909.00000040,909 |
&0000000000000436.650000436.65 sq mi
(&0000000000001131.0000001,131 km²) |
 |
| Van Wert County |
161 |
Van Wert |
April 1, 1820 |
Darke County |
Isaac Van Wart (1760-1828), captor of spy John André during the Revolutionary War |
&0000000000029659.00000029,659 |
&0000000000000410.090000410.09 sq mi
(&0000000000001062.0000001,062 km²) |
 |
| Vinton County |
163 |
McArthur |
March 23, 1850 |
Athens, Gallia, Hocking, Jackson, and Ross Counties |
Samuel Finley Vinton (1792-1862), Ohio Statesman and U.S. Congressman |
&0000000000012806.00000012,806 |
&0000000000000414.080000414.08 sq mi
(&0000000000001072.0000001,072 km²) |
 |
| Warren County |
165 |
Lebanon |
May 1, 1803 |
Hamilton County |
General Joseph Warren (1741-1775), a Revolutionary War officer |
&0000000000158383.000000158,383 |
&0000000000000399.630000399.63 sq mi
(&0000000000001035.0000001,035 km²) |
 |
| Washington County |
167 |
Marietta |
July 27, 1788 |
One of the original counties |
George Washington (1732–1799), president of the Constitutional Convention |
&0000000000063251.00000063,251 |
&0000000000000635.150000635.15 sq mi
(&0000000000001645.0000001,645 km²) |
 |
| Wayne County |
169 |
Wooster |
August 15, 1796 |
Refactored from non-county territory |
General Anthony Wayne (1745–1796), a Revolutionary War officer |
&0000000000111564.000000111,564 |
&0000000000000555.360000555.36 sq mi
(&0000000000001438.0000001,438 km²) |
 |
| Williams County |
171 |
Bryan |
April 1, 1820 |
Darke County |
David Williams (1754-1831), captor of spy John André during the Revolutionary War |
&0000000000039188.00000039,188 |
&0000000000000421.740000421.74 sq mi
(&0000000000001092.0000001,092 km²) |
 |
| Wood County |
173 |
Bowling Green |
April 1, 1820 |
Refactored from non-county territory |
Eleazer D. Wood (1783 -1814), founder of Fort Meigs |
&0000000000121065.000000121,065 |
&0000000000000617.320000617.32 sq mi
(&0000000000001599.0000001,599 km²) |
 |
| Wyandot County |
175 |
Upper Sandusky |
February 3, 1845 |
Marion, Crawford, and Hardin Counties |
Wyandot Indians |
&0000000000022908.00000022,908 |
&0000000000000405.610000405.61 sq mi
(&0000000000001051.0000001,051 km²) |
 |
