| County 
 | FIPS County Code [13]
 | County seat [6]
 | Established [1]
 | Origin [1][11]
 | Etymology [1][11]
 | Population [7]
 | Area [6]
 | Map 
 | 
| Barbour County | 001 | Philippi | 1843 | Harrison, Lewis and Randolph counties | Philip Pendleton Barbour (1783–1841)
 United States Speaker of the House
 (1821–23)
 | 7004165890000000000♠16,589 | 7002341000000000000♠341 sq mi (7002883000000000000♠883 km2)
 |   | 
| Berkeley County | 003 | Martinsburg | 1772 | Frederick County (Virginia) | Norborne Berkeley (1717–70)
 Royal Governor of Virginia
 (1768–70)
 | 7005104169000000000♠104,169 | 7002321000000000000♠321 sq mi (7002831000000000000♠831 km2)
 |   | 
| Boone County | 005 | Madison | 1847 | Cabell, Kanawha, and Logan counties | Daniel Boone (1734–1820)
 American frontiersman
 | 7004246290000000000♠24,629 | 7002503000000000000♠503 sq mi (7003130300000000000♠1,303 km2)
 |   | 
| Braxton County | 007 | Sutton | 1836 | Kanawha, Lewis, and Nicholas counties | Carter Braxton (1736–97)
 Signer of the Declaration of Independence
 | 7004145230000000000♠14,523 | 7002514000000000000♠514 sq mi (7003133100000000000♠1,331 km2)
 |   | 
| Brooke County | 009 | Wellsburg | 1796 | Ohio County | Robert Brooke (1761–1800)
 Governor of Virginia
 (1794–96)
 | 7004240690000000000♠24,069 | 7001890000000000000♠89 sq mi (7002231000000000000♠231 km2)
 |   | 
| Cabell County | 011 | Huntington | 1809 | Kanawha County | William H. Cabell (1772–1853)
 Governor of Virginia
 (1805–08)
 | 7004963190000000000♠96,319 | 7002282000000000000♠282 sq mi (7002730000000000000♠730 km2)
 |   | 
| Calhoun County | 013 | Grantsville | 1856 | Gilmer County | John C. Calhoun (1782–1850)
 United States Vice President
 (1825–32)
 | 7003762700000000000♠7,627 | 7002281000000000000♠281 sq mi (7002728000000000000♠728 km2)
 |   | 
| Clay County | 015 | Clay | 1858 | Braxton and Nicholas counties | Henry Clay (1777–1852)
 United States Senator Kentucky
 (1823–25)
 United States Speaker of the House
 (1849–52)
 | 7003938600000000000♠9,386 | 7002342000000000000♠342 sq mi (7002886000000000000♠886 km2)
 |   | 
| Doddridge County | 017 | West Union | 1845 | Harrison,  Lewis, Ritchie, and Taylor counties | Philip Doddridge (1773–1832)
 United States Congressman (Virginia)
 (1829–32)
 | 7003820200000000000♠8,202 | 7002320000000000000♠320 sq mi (7002829000000000000♠829 km2)
 |   | 
| Fayette County | 019 | Fayetteville | 1831 | Kanawha, Greenbrier, Logan and Nicholas counties | Marquis de Lafayette (1757–1834)
 French-born American Revolutionary War General
 | 7004460390000000000♠46,039 | 7002664000000000000♠664 sq mi (7003172000000000000♠1,720 km2)
 |   | 
| Gilmer County | 021 | Glenville | 1845 | Kanawha and Lewis counties | Thomas Walker Gilmer (1802–44)
 United States Secretary of the Navy
 (1844)
 Governor of Virginia
 (1840–41)
 | 7003869300000000000♠8,693 | 7002340000000000000♠340 sq mi (7002881000000000000♠881 km2)
 |   | 
| Grant County | 023 | Petersburg | 1866 | Hardy County | Ulysses S. Grant (1822–85)
 United States President
 (1869–77)
 | 7004119370000000000♠11,937 | 7002477000000000000♠477 sq mi (7003123500000000000♠1,235 km2)
 |   | 
| Greenbrier County | 025 | Lewisburg | 1778 | Montgomery County (Virginia) and Botetourt County (Virginia) | Greenbrier River | 7004354800000000000♠35,480 | 7003102100000000000♠1,021 sq mi (7003264400000000000♠2,644 km2)
 |   | 
| Hampshire County | 027 | Romney | 1754 | Augusta County (Virginia) and Frederick County (Virginia) | County of Hampshire in England | 7004239640000000000♠23,964 | 7002642000000000000♠642 sq mi (7003166300000000000♠1,663 km2)
 |   | 
| Hancock County | 029 | New Cumberland | 1848 | Brooke County | John Hancock (1737–93)
 One of the Signers of the Declaration of Independence
 Governor of Massachusetts
 (1780–85)
 and (1787–93)
 | 7004306760000000000♠30,676 | 7001830000000000000♠83 sq mi (7002215000000000000♠215 km2)
 |   | 
| Hardy County | 031 | Moorefield | 1786 | Hampshire County | Samuel Hardy (1758–85)
 Virginia delegate to the Continental Congress
 (1783–85)
 | 7004140250000000000♠14,025 | 7002583000000000000♠583 sq mi (7003151000000000000♠1,510 km2)
 |   | 
| Harrison County | 033 | Clarksburg | 1784 | Monongalia County | Benjamin Harrison V (1726–91)
 Governor of Virginia
 (1781–84)
 | 7004690990000000000♠69,099 | 7002416000000000000♠416 sq mi (7003107700000000000♠1,077 km2)
 |   | 
| Jackson County | 035 | Ripley | 1831 | Kanawha, Mason, and Wood counties | Andrew Jackson (1767–1845)
 United States President
 (1829–37)
 | 7004292110000000000♠29,211 | 7002466000000000000♠466 sq mi (7003120700000000000♠1,207 km2)
 |   | 
| Jefferson County | 037 | Charles Town | 1801 | Berkeley County | Thomas Jefferson (1743–1826)
 United States President
 (1801–09)
 | 7004534980000000000♠53,498 | 7002210000000000000♠210 sq mi (7002544000000000000♠544 km2)
 |   | 
| Kanawha County | 039 | Charleston | 1789 | Greenbrier and Montgomery County (Virginia) | Kanawha River | 7005193063000000000♠193,063 | 7002903000000000000♠903 sq mi (7003233900000000000♠2,339 km2)
 |   | 
| Lewis County | 041 | Weston | 1816 | Harrison County | Charles Lewis (1736–74)
 American Colonel killed at the
 Battle of Point Pleasant[14]
 | 7004163720000000000♠16,372 | 7002389000000000000♠389 sq mi (7003100800000000000♠1,008 km2)
 |   | 
| Lincoln County | 043 | Hamlin | 1867 | Boone, Cabell, Kanawha and Putnam counties | Abraham Lincoln (1809–65)
 United States President
 (1861–65)
 | 7004217200000000000♠21,720 | 7002438000000000000♠438 sq mi (7003113400000000000♠1,134 km2)
 |   | 
| Logan County | 045 | Logan | 1824 | Cabell and Kanawha counties, Giles County (Virginia) and Tazewell County (Virginia) | Chief Logan (c.1723-80)
 Mingo leader
 | 7004367430000000000♠36,743 | 7002454000000000000♠454 sq mi (7003117600000000000♠1,176 km2)
 |   | 
| Marion County | 049 | Fairmont | 1842 | Harrison and Monongalia counties | Francis Marion (1732–95)
 American Revolutionary War  General
 (1757–82)
 | 7004564180000000000♠56,418 | 7002310000000000000♠310 sq mi (7002803000000000000♠803 km2)
 |   | 
| Marshall County | 051 | Moundsville | 1835 | Ohio County | John Marshall (1755–1835)
 United States Secretary of State
 (1800–01)
 Chief Justice of the United States
 (1801–35)
 | 7004331070000000000♠33,107 | 7002307000000000000♠307 sq mi (7002795000000000000♠795 km2)
 |   | 
| Mason County | 053 | Point Pleasant | 1804 | Kanawha County | George Mason (1725–92)
 United States Constitutional Convention
 "Father of the Bill of Rights"
 | 7004273240000000000♠27,324 | 7002432000000000000♠432 sq mi (7003111900000000000♠1,119 km2)
 |   | 
| McDowell County | 047 | Welch | 1858 | Tazewell County (Virginia) | James McDowell (1795–1851)
 Governor of Virginia
 (1843–46)
 | 7004221130000000000♠22,113 | 7002535000000000000♠535 sq mi (7003138600000000000♠1,386 km2)
 |   | 
| Mercer County | 055 | Princeton | 1837 | Giles County (Virginia) and Tazewell County (Virginia) | Hugh Mercer (1726–77)
 American Revolutionary War General
 (1775–76)
 | 7004622640000000000♠62,264 | 7002420000000000000♠420 sq mi (7003108800000000000♠1,088 km2)
 |   | 
| Mineral County | 057 | Keyser | 1866 | Hampshire County | abundant mineral resources | 7004282120000000000♠28,212 | 7002328000000000000♠328 sq mi (7002850000000000000♠850 km2)
 |   | 
| Mingo County | 059 | Williamson | 1895 | Logan County | Mingo Native Americans | 7004268390000000000♠26,839 | 7002423000000000000♠423 sq mi (7003109600000000000♠1,096 km2)
 |   | 
| Monongalia County | 061 | Morgantown | 1776 | Augusta County (Virginia) | Latin derivation for Monongahela River | 7004961890000000000♠96,189 | 7002361000000000000♠361 sq mi (7002935000000000000♠935 km2)
 |   | 
| Monroe County | 063 | Union | 1799 | Greenbrier County | James Monroe (1758–1831)
 United States Senator (Virginia)
 (1790–94)
 Governor of Virginia
 (1799–1802)
 and (1811)
 United States President
 (1817–25)
 | 7004135020000000000♠13,502 | 7002473000000000000♠473 sq mi (7003122500000000000♠1,225 km2)
 |   | 
| Morgan County | 065 | Berkeley Springs | 1820 | Berkeley and Hampshire counties | Daniel Morgan (1736–1802)
 United States Congressman (Virginia)
 (1797–99)
 | 7004175410000000000♠17,541 | 7002229000000000000♠229 sq mi (7002593000000000000♠593 km2)
 |   | 
| Nicholas County | 067 | Summersville | 1818 | Greenbrier, Kanawha and Randolph counties | Wilson Cary Nicholas (1761–1820)
 United States Senator (Virginia)
 (1799–1804)
 Governor of Virginia
 (1814–16)
 | 7004262330000000000♠26,233 | 7002649000000000000♠649 sq mi (7003168100000000000♠1,681 km2)
 |   | 
| Ohio County | 069 | Wheeling | 1776 | Augusta County (Virginia) | Ohio River | 7004444430000000000♠44,443 | 7002106000000000000♠106 sq mi (7002275000000000000♠275 km2)
 |   | 
| Pendleton County | 071 | Franklin | 1788 | Augusta County (Virginia), Rockinham County (Virginia) and Hardy | Edmund Pendleton (1721–1803)
 First Continental Congress
 (1774)
 | 7003769500000000000♠7,695 | 7002698000000000000♠698 sq mi (7003180800000000000♠1,808 km2)
 |   | 
| Pleasants County | 073 | Saint Marys | 1851 | Ritchie, Tyler, and Wood counties | James Pleasants, Jr. (1769–1836)
 United States Senator (Virginia)
 (1819–22)
 Governor of Virginia
 (1822–25)
 | 7003760500000000000♠7,605 | 7002131000000000000♠131 sq mi (7002339000000000000♠339 km2)
 |   | 
| Pocahontas County | 075 | Marlinton | 1821 | Bath County (Virginia), Pendleton and Randolph | Pocahontas (c. 1595–1617)
 Powhatan Native American who assisted early English settlers
 | 7003871900000000000♠8,719 | 7002940000000000000♠940 sq mi (7003243500000000000♠2,435 km2)
 |   | 
| Preston County | 077 | Kingwood | 1818 | Monongalia County | James Patton Preston (1774–1843)
 Governor of Virginia
 (1816–19)
 | 7004335200000000000♠33,520 | 7002648000000000000♠648 sq mi (7003167800000000000♠1,678 km2)
 |   | 
| Putnam County | 079 | Winfield | 1848 | Cabell, Kanawha, and Mason counties | Israel Putnam (1718–90)
 American Revolutionary War General
 | 7004554860000000000♠55,486 | 7002346000000000000♠346 sq mi (7002896000000000000♠896 km2)
 |   | 
| Raleigh County | 081 | Beckley | 1850 | Fayette County | Sir Walter Raleigh (1554–1618)
 English explorer and poet
 | 7004788590000000000♠78,859 | 7002607000000000000♠607 sq mi (7003157200000000000♠1,572 km2)
 |   | 
| Randolph County | 083 | Elkins | 1787 | Harrison County | Edmund Jennings Randolph (1753–1813)
 Governor of Virginia
 (1786–88)
 First United States Attorney General
 (1789–94)
 | 7004294050000000000♠29,405 | 7003104000000000000♠1,040 sq mi (7003269400000000000♠2,694 km2)
 |   | 
| Ritchie County | 085 | Harrisville | 1843 | Harrison, Lewis, and Wood counties | Thomas Ritchie (1778–1854)
 nationally influential Virginia newspaper publisher
 | 7004104490000000000♠10,449 | 7002454000000000000♠454 sq mi (7003117600000000000♠1,176 km2)
 |   | 
| Roane County | 087 | Spencer | 1856 | Gilmer, Jackson and Kanawha counties | Spencer Roane (1762–1822)
 Virginia Supreme Court Justice
 (1794–1822)
 | 7004149260000000000♠14,926 | 7002484000000000000♠484 sq mi (7003125400000000000♠1,254 km2)
 |   | 
| Summers County | 089 | Hinton | 1871 | Fayette, Greenbrier, Mercer and Monroe counties | George W. Summers (1804–68)
 United States Congressman (Virginia)
 (1843)
 | 7004139270000000000♠13,927 | 7002361000000000000♠361 sq mi (7002935000000000000♠935 km2)
 |   | 
| Taylor County | 091 | Grafton | 1844 | Barbour, Harrison, Marion counties | John Taylor of Caroline (1753–1824)
 United States Senator (Virginia)
 (1792–94) and
 (1803) and
 (1822–24)
 | 7004168950000000000♠16,895 | 7002173000000000000♠173 sq mi (7002448000000000000♠448 km2)
 |   | 
| Tucker County | 093 | Parsons | 1856 | Randolph County | Henry St. George Tucker (1780–1848)
 United States Congressman (Virginia)
 (1815–19)
 Virginia Supreme Court
 (1831–41)
 | 7003714100000000000♠7,141 | 7002419000000000000♠419 sq mi (7003108500000000000♠1,085 km2)
 |   | 
| Tyler County | 095 | Middlebourne | 1814 | Ohio County | John Tyler, Sr. (1747–1813)
 Governor of Virginia
 (1808–11)
 | 7003920800000000000♠9,208 | 7002258000000000000♠258 sq mi (7002668000000000000♠668 km2)
 |   | 
| Upshur County | 097 | Buckhannon | 1851 | Barbour, Lewis and Randolph counties | Abel Parker Upshur (1790–1844)
 United States Secretary of the Navy
 (1841–43)
 United States Secretary of State
 (1843–44)
 | 7004242540000000000♠24,254 | 7002355000000000000♠355 sq mi (7002919000000000000♠919 km2)
 |   | 
| Wayne County | 099 | Wayne | 1842 | Cabell County | "Mad" Anthony Wayne Major General
 (1745–96)
 American Revolutionary War
 (1775–83)
 and (1792–96)
 United States Congressman Georgia
 (1791)
 | 7004424810000000000♠42,481 | 7002506000000000000♠506 sq mi (7003131100000000000♠1,311 km2)
 |   | 
| Webster County | 101 | Webster Springs | 1860 | Braxton, Nicholas, and Randolph counties | Daniel Webster (1782–1852)
 United States Senator Massachusetts
 (1827–41) and
 (1845–50)
 United States Secretary of State
 (1841–53) and
 (1850–52)
 | 7003915400000000000♠9,154 | 7002556000000000000♠556 sq mi (7003144000000000000♠1,440 km2)
 |   | 
| Wetzel County | 103 | New Martinsville | 1846 | Tyler County | Lewis Wetzel (1763–1808)
 noted frontiersman
 | 7004165830000000000♠16,583 | 7002359000000000000♠359 sq mi (7002930000000000000♠930 km2)
 |   | 
| Wirt County | 105 | Elizabeth | 1848 | Jackson and Wood counties | William Wirt (1772–1834)
 United States Attorney General
 (1817–29)
 | 7003571700000000000♠5,717 | 7002233000000000000♠233 sq mi (7002603000000000000♠603 km2)
 |   | 
| Wood County | 107 | Parkersburg | 1798 | Harrison County | James Wood (1741–1813)
 Governor of Virginia
 (1796–99)
 | 7004869560000000000♠86,956 | 7002367000000000000♠367 sq mi (7002951000000000000♠951 km2)
 |   | 
| Wyoming County | 109 | Pineville | 1850 | Logan County | derived from Lenape Native American term for "wide plain" | 7004237960000000000♠23,796 | 7002501000000000000♠501 sq mi (7003129800000000000♠1,298 km2)
 |  |