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List of counties in Pennsylvania

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There are sixty-seven counties of the Commonwealth of Pennsylvania in the United States of America. The city of Philadelphia shares boundaries with Philadelphia County, and governmental functions have been shared since 1854.

FIPS code

The Federal Information Processing Standard (FIPS) code, used by the United States government to uniquely identify counties, is provided with each entry. FIPS codes are five digit numbers, for Pennsylvania the codes start with 42 and are completed with the three digit county code. The FIPS code for each county in the table links to census data for that county.[1]

Alphabetical list

County
FIPS Code[2]County Seat
[3]		Created
[3]		Origin
Meaning of name
[4]		Population
(2020)[3]		Area
[3]		Map
 
Adams County001Gettysburg1800Parts of York County.John Adams, second U.S. President103,852522 sq mi
(1,352 km2)
Allegheny County003Pittsburgh1788Parts of Washington and Westmoreland Counties.Delaware word for the Allegheny River, which possibly translates to "beautiful river"1,250,578745 sq mi
(1,930 km2)
Armstrong County005Kittanning1800Parts of Allegheny, Lycoming, and Westmoreland Counties.John Armstrong, Revolutionary War general65,558664 sq mi
(1,720 km2)
Beaver County007Beaver1800Parts of Allegheny and Washington Counties.Beaver River, itself named for the beaver, which was sighted along its banks168,215444 sq mi
(1,150 km2)
Bedford County009Bedford1771Parts of Cumberland County.Fort Bedford, which is named for John Russell, 4th Duke of Bedford47,5771,015 sq mi
(2,629 km2)
Berks County011Reading1752Parts of Chester, Lancaster and Philadelphia Counties.The English county of Berkshire428,849866 sq mi
(2,243 km2)
Blair County013Hollidaysburg1846Parts of Huntingdon and Bedford Counties.John Blair, Pennsylvania state legislator122,822527 sq mi
(1,365 km2)
Bradford County015Towanda1810Parts of Luzerne and Lycoming Counties; originally called Ontario County, renamed as Bradford County in 1812.William Bradford, second U.S. Attorney General59,9671,161 sq mi
(3,007 km2)
Bucks County017Doylestown1682One of the original counties at the formation of PennsylvaniaThe English county of Buckinghamshire646,538622 sq mi
(1,611 km2)
Butler County019Butler1800Parts of Allegheny County.Richard Butler, Revolutionary War general193,763795 sq mi
(2,059 km2)
Cambria County021Ebensburg1804Parts of Somerset and Huntingdon Counties.Cambria, the traditional name for Wales133,472693 sq mi
(1,795 km2)
Cameron County023Emporium1860Parts of Clinton, Elk, McKean, and Potter Counties.Simon Cameron, U.S. Senator from Pennsylvania4,547399 sq mi
(1,033 km2)
Carbon County025Jim Thorpe1843Parts of Monroe and Northampton Counties.Carbon, the element found in coal64,749387 sq mi
(1,002 km2)
Centre County027Bellefonte1800Parts of Lycoming, Mifflin, Northumberland, and Huntingdon Counties.Centre Furnace, the first industrial facility in the area158,1721,112 sq mi
(2,880 km2)
Chester County029West Chester1682One of the original counties at the formation of Pennsylvania.The English city of Chester in the county of Cheshire534,413760 sq mi
(1,968 km2)
Clarion County031Clarion1839Parts of Venango and Armstrong Counties.Clarion River, itself so named for its clarity37,241609 sq mi
(1,577 km2)
Clearfield County033Clearfield1804Parts of Lycoming and Huntingdon Counties; Clearfield functioned as a part of Centre County for judiciary purposes until 1822.The cleared fields from logging in the area80,5621,154 sq mi
(2,989 km2)
Clinton County035Lock Haven1839Parts of Lycoming and Centre Counties.DeWitt Clinton, New York Governor and prominent statesman37,450898 sq mi
(2,326 km2)
Columbia County037Bloomsburg1813Parts of Northumberland and Luzerne Counties.Columbia, the first popular and poetic name for the United States64,727490 sq mi
(1,269 km2)
Crawford County039Meadville1800Parts of Allegheny County.William Crawford, surveyor who helped to open trans-Appalachian lands to settlement83,9381,038 sq mi
(2,688 km2)
Cumberland County041Carlisle1750Parts of Lancaster County.The historic English county of Cumberland259,469551 sq mi
(1,427 km2)
Dauphin County043Harrisburg1785Parts of Lancaster County.Louis-Joseph, Dauphin of France286,401558 sq mi
(1,445 km2)
Delaware County045Media1789Parts of Chester County.Delaware River, itself named for Lord De La Warr576,830191 sq mi
(495 km2)
Elk County047Ridgway1843Parts of Jefferson, McKean, and Clearfield Counties.Elk, which inhabit the forested county30,990832 sq mi
(2,155 km2)
Erie County049Erie1800Parts of Allegheny County; attached to Crawford County until 1803.Lake Erie270,876799 sq mi
(2,069 km2)
Fayette County051Uniontown1783Parts of Westmoreland County.The Marquis de Lafayette, French-born Revolutionary War general128,804798 sq mi
(2,067 km2)
Forest County053Tionesta1848Parts of Jefferson County; attached to Jefferson County until 1857.Chief natural feature6,973431 sq mi
(1,116 km2)
Franklin County055Chambersburg1784Parts of Cumberland County.Benjamin Franklin, key Founding Father of the United States155,932771 sq mi
(1,997 km2)
Fulton County057McConnellsburg1850Parts of Bedford County.Robert Fulton, inventor of the steamboat14,556438 sq mi
(1,134 km2)
Greene County059Waynesburg1796Parts of Washington County.Nathanael Greene, Revolutionary War general35,954578 sq mi
(1,497 km2)
Huntingdon County061Huntingdon1787Parts of Bedford County.The historic English county of Huntingdonshire44,092889 sq mi
(2,302 km2)
Indiana County063Indiana1803Parts of Lycoming and Westmoreland Counties; it was attached to Westmoreland County until 1806.Native Americans83,246834 sq mi
(2,160 km2)
Jefferson County065Brookville1804Parts of Lycoming County. Attached to Westmoreland County until 1806 and to Indiana County until 1830.Thomas Jefferson, third U.S. President44,492657 sq mi
(1,702 km2)
Juniata County067Mifflintown1831Parts of Mifflin County.Juniata River, itself named for the Iroquoian word Onayutta, meaning "Standing Stone"23,509394 sq mi
(1,020 km2)
Lackawanna County069Scranton1878Parts of Luzerne County.Lackawanna River, itself named for the Delaware word meaning "stream that forks"215,896465 sq mi
(1,204 km2)
Lancaster County071Lancaster1729Parts of Chester County.The English city of Lancaster552,984984 sq mi
(2,549 km2)
Lawrence County073New Castle1849Parts of Beaver and Mercer Counties.James Lawrence, War of 1812 captain86,070363 sq mi
(940 km2)
Lebanon County075Lebanon1813Parts of Dauphin and Lancaster Counties.Lebanon, the Biblical term for "White Mountain", which references the piety of the county's Moravian founders143,257363 sq mi
(940 km2)
Lehigh County077Allentown1812Parts of Northampton County.Lehigh River374,557349 sq mi
(904 km2)
Luzerne County079Wilkes-Barre1786Parts of Northumberland County.Anne-César, Chevalier de la Luzerne, French ambassador to the U.S. who aided republican causes325,594907 sq mi
(2,349 km2)
Lycoming County081Williamsport1795Parts of Northumberland County.Lycoming Creek, itself named for the Delaware word iacomic meaning "great steam"114,1881,244 sq mi
(3,222 km2)
McKean County083Smethport1804Parts of Lycoming County; Attached to Centre County until 1814 and to Lycoming County until 1826 for judicial and elective purposes. McKean was fully organized only in 1826.Thomas McKean, second Governor of Pennsylvania40,432984 sq mi
(2,549 km2)
Mercer County085Mercer1800Parts of Allegheny County.Hugh Mercer, Revolutionary War general110,652683 sq mi
(1,769 km2)
Mifflin County087Lewistown1789Parts of Cumberland and Northumberland Counties.Thomas Mifflin, first Governor of Pennsylvania46,143415 sq mi
(1,075 km2)
Monroe County089Stroudsburg1836Parts of Pike and Northampton Counties.James Monroe, fifth U.S President168,327617 sq mi
(1,598 km2)
Montgomery County091Norristown1784Parts of Philadelphia County.The historic Welsh county of Montgomeryshire or Richard Montgomery, a general killed in the 1775 Battle of Quebec856,553487 sq mi
(1,261 km2)
Montour County093Danville1850Parts of Columbia County.Madame Montour, colonial ambassador to the Native Americans18,136132 sq mi
(342 km2)
Northampton County095Easton1752Parts of Bucks County.The English town of Northampton312,951377 sq mi
(976 km2)
Northumberland County097Sunbury1772Parts of Lancaster, Berks, Bedford, Cumberland, and Northampton Counties.The English county of Northumberland91,647477 sq mi
(1,235 km2)
Perry County099New Bloomfield1820Parts of Cumberland County.Oliver Hazard Perry, War of 1812 commodore45,842556 sq mi
(1,440 km2)
Philadelphia County101Philadelphia1682One of the original counties at the formation of Pennsylvania."Brotherly love" from Greek philos ("love") and adelphos ("brother")1,603,797143 sq mi
(370 km2)
Pike County103Milford1814Parts of Wayne County.Zebulon Pike, explorer of the American West58,535567 sq mi
(1,469 km2)
Potter County105Coudersport1804From Lycoming county. Attached to Lycoming County until 1826 and to McKean County until 1835 for judicial purposes, Potter was not fully organized until 1835.James Potter, Revolutionary War general16,3961,081 sq mi
(2,800 km2)
Schuylkill County107Pottsville1811Parts of Berks and Northampton Counties.Schuylkill River, itself a Dutch corruption of a Delaware word possibly meaning "hidden river"143,049778 sq mi
(2,015 km2)
Snyder County109Middleburg1855Parts of Union County.Simon Snyder, third Governor of Pennsylvania39,736332 sq mi
(860 km2)
Somerset County111Somerset1795Parts of Bedford County.The historic English county of Somerset74,1291,081 sq mi
(2,800 km2)
Sullivan County113Laporte1847Parts of Lycoming County; attached to Lycoming until 1848.John Sullivan, Revolutionary War general5,840452 sq mi
(1,171 km2)
Susquehanna County115Montrose1810Parts of Luzerne County ; attached to Luzerne County until 1812.Susquehanna River, itself named after an Algonquin word for "muddy current"38,434832 sq mi
(2,155 km2)
Tioga County117Wellsboro1804Parts of Lycoming County; attached to Lycoming until 1812.Tioga River, itself named for the Delaware word for "forks of the stream"41,0451,137 sq mi
(2,945 km2)
Union County119Lewisburg1813Parts of Northumberland County.The federal union of the states42,681317 sq mi
(821 km2)
Venango County121Franklin1800Parts of Allegheny and Lycoming Counties; attached to until 1805.A corruption of the Delaware word onenge, meaning "otter"50,454683 sq mi
(1,769 km2)
Warren County123Warren1800Parts of Allegheny and Lycoming counties; attached to Crawford County until 1805 and then to Venango until Warren was formally organized in 1819.Joseph Warren, Revolutionary War general38,587898 sq mi
(2,326 km2)
Washington County125Washington1781Parts of Westmoreland County.George Washington, first U.S. President209,349861 sq mi
(2,230 km2)
Wayne County127Honesdale1798Parts of Northampton County.Anthony Wayne, Revolutionary War general51,155751 sq mi
(1,945 km2)
Westmoreland County129Greensburg1773Parts of Bedford County.The historic English county of Westmorland354,6631,036 sq mi
(2,683 km2)
Wyoming County131Tunkhannock1842Parts of Luzerne County.The Delaware word xwéːwaməŋk, meaning "at the big river flat"26,069405 sq mi
(1,049 km2)
York County133York1749Parts of Lancaster County.The English city of York456,438910 sq mi
(2,357 km2)

References

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