Alphabetical List
| County |
FIPS code |
County seat |
Established |
Origin |
Etymology |
Population |
Area |
Map |
|---|---|---|---|---|---|---|---|---|
| Adams County | 001 | Gettysburg | 1800 | Parts of York County. | John Adams,second U.S. President | 7005101407000000000101,407 | 7002522000000000000522 sq mi (70031352000000000001,352 km2) |
|
| Allegheny County | 003 | Pittsburgh | 1788 | Parts of Washington and Westmoreland Counties. | Lenape word for the Allegheny River, which possibly translates to "beautiful river" | 70061223348000000001,223,348 | 7002745000000000000745 sq mi (70031930000000000001,930 km2) |
|
| Armstrong County | 005 | Kittanning | 1800 | Parts of Allegheny, Lycoming, and Westmoreland Counties. | John Armstrong, Revolutionary War general | 700468941000000000068,941 | 7002664000000000000664 sq mi (70031720000000000001,720 km2) |
|
| Beaver County | 007 | Beaver | 1800 | Parts of Allegheny and Washington Counties. | Beaver River, itself named for the eponymous animal that was sighted along its banks | 7005170539000000000170,539 | 7002444000000000000444 sq mi (70031150000000000001,150 km2) |
|
| Bedford County | 009 | Bedford | 1771 | Parts of Cumberland County. | Fort Bedford, which is named for John Russell, 4th Duke of Bedford | 700449762000000000049,762 | 70031015000000000001,015 sq mi (70032629000000000002,629 km2) |
|
| Berks County | 011 | Reading | 1752 | Parts of Chester, Lancaster and Philadelphia Counties. | The English county of Berkshire | 7005411442000000000411,442 | 7002866000000000000866 sq mi (70032243000000000002,243 km2) |
|
| Blair County | 013 | Hollidaysburg | 1846 | Parts of Huntingdon and Bedford Counties. | John Blair, Pennsylvania state legislator | 7005127089000000000127,089 | 7002527000000000000527 sq mi (70031365000000000001,365 km2) |
|
| Bradford County | 015 | Towanda | 1810 | Parts of Luzerne and Lycoming Counties; originally called Ontario County, renamed as Bradford County in 1812. | William Bradford, second U.S. Attorney General | 700462622000000000062,622 | 70031161000000000001,161 sq mi (70033007000000000003,007 km2) |
|
| Bucks County | 017 | Doylestown | 1682 | One of the original counties at the formation of Pennsylvania | The English county of Buckinghamshire | 7005625249000000000625,249 | 7002622000000000000622 sq mi (70031611000000000001,611 km2) |
|
| Butler County | 019 | Butler | 1800 | Parts of Allegheny County. | Richard Butler, Revolutionary War general | 7005183862000000000183,862 | 7002795000000000000795 sq mi (70032059000000000002,059 km2) |
|
| Cambria County | 021 | Ebensburg | 1804 | Parts of Somerset and Huntingdon Counties. | Cambria, the traditional name for Wales | 7005143679000000000143,679 | 7002693000000000000693 sq mi (70031795000000000001,795 km2) |
|
| Cameron County | 023 | Emporium | 1860 | Parts of Clinton, Elk, McKean, and Potter Counties. | Simon Cameron, U.S. Senator from Pennsylvania | 70035085000000000005,085 | 7002399000000000000399 sq mi (70031033000000000001,033 km2) |
|
| Carbon County | 025 | Jim Thorpe | 1843 | Parts of Monroe and Northampton Counties. | Carbon, the element found in coal | 700465249000000000065,249 | 7002387000000000000387 sq mi (70031002000000000001,002 km2) |
|
| Centre County | 027 | Bellefonte | 1800 | Parts of Lycoming, Mifflin, Northumberland, and Huntingdon Counties. | Centre Furnance, the first industrial facility in the area | 7005153990000000000153,990 | 70031112000000000001,112 sq mi (70032880000000000002,880 km2) |
|
| Chester County | 029 | West Chester | 1682 | One of the original counties at the formation of Pennsylvania. | The English city of Chester in the county of Cheshire | 7005498886000000000498,886 | 7002760000000000000760 sq mi (70031968000000000001,968 km2) |
|
| Clarion County | 031 | Clarion | 1839 | Parts of Venango and Armstrong Counties. | Clarion River, itself so named for its clarity | 700439988000000000039,988 | 7002609000000000000609 sq mi (70031577000000000001,577 km2) |
|
| Clearfield County | 033 | Clearfield | 1804 | Parts 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 area | 700481642000000000081,642 | 70031154000000000001,154 sq mi (70032989000000000002,989 km2) |
|
| Clinton County | 035 | Lock Haven | 1839 | Parts of Lycoming and Centre Counties. | DeWitt Clinton, New York Governor and prominent statesman | 700439238000000000039,238 | 7002898000000000000898 sq mi (70032326000000000002,326 km2) |
|
| Columbia County | 037 | Bloomsburg | 1813 | Parts of Northumberland and Luzerne Counties. | Columbia, the first popular and poetic name for the United States | 700467295000000000067,295 | 7002490000000000000490 sq mi (70031269000000000001,269 km2) |
|
| Crawford County | 039 | Meadville | 1800 | Parts of Allegheny County. | William Crawford, surveyor who helped to open trans-Appalachian lands to settlement | 700488765000000000088,765 | 70031038000000000001,038 sq mi (70032688000000000002,688 km2) |
|
| Cumberland County | 041 | Carlisle | 1750 | Parts of Lancaster County. | The historic English county of Cumberland | 7005235406000000000235,406 | 7002551000000000000551 sq mi (70031427000000000001,427 km2) |
|
| Dauphin County | 043 | Harrisburg | 1785 | Parts of Lancaster County. | Louis-Joseph, Dauphin of France | 7005268100000000000268,100 | 7002558000000000000558 sq mi (70031445000000000001,445 km2) |
|
| Delaware County | 045 | Media | 1789 | Parts of Chester County. | Delaware River, itself named for the Delaware tribe | 7005558979000000000558,979 | 7002191000000000000191 sq mi (7002495000000000000495 km2) |
|
| Elk County | 047 | Ridgway | 1843 | Parts of Jefferson, McKean, and Clearfield Counties. | Elk, which inhabit the forested county | 700431946000000000031,946 | 7002832000000000000832 sq mi (70032155000000000002,155 km2) |
|
| Erie County | 049 | Erie | 1800 | Parts of Allegheny County; attached to Crawford County until 1803. | Lake Erie | 7005280566000000000280,566 | 70031558000000000001,558 sq mi (70034035000000000004,035 km2) |
|
| Fayette County | 051 | Uniontown | 1783 | Parts of Westmoreland County. | The Marquis de Lafayette, French-born Revolutionary War general | 7005136606000000000136,606 | 7002798000000000000798 sq mi (70032067000000000002,067 km2) |
|
| Forest County | 053 | Tionesta | 1848 | Parts of Jefferson County; attached to Jefferson County until 1857. | Chief natural feature | 70037716000000000007,716 | 7002431000000000000431 sq mi (70031116000000000001,116 km2) |
|
| Franklin County | 055 | Chambersburg | 1784 | Parts of Cumberland County. | Benjamin Franklin, key founding father of the United States | 7005149618000000000149,618 | 7002771000000000000771 sq mi (70031997000000000001,997 km2) |
|
| Fulton County | 057 | McConnellsburg | 1850 | Parts of Bedford County. | Robert Fulton, inventor of the steamboat | 700414845000000000014,845 | 7002438000000000000438 sq mi (70031134000000000001,134 km2) |
|
| Greene County | 059 | Waynesburg | 1796 | Parts of Washington County. | Nathanael Greene, Revolutionary War general | 700438686000000000038,686 | 7002578000000000000578 sq mi (70031497000000000001,497 km2) |
|
| Huntingdon County | 061 | Huntingdon | 1787 | Parts of Bedford County. | The historic English county of Huntingdonshire | 700445913000000000045,913 | 7002889000000000000889 sq mi (70032302000000000002,302 km2) |
|
| Indiana County | 063 | Indiana | 1803 | Parts of Lycoming and Westmoreland Counties; it was attached to Westmoreland County until 1806. | Native Americans | 700488880000000000088,880 | 7002834000000000000834 sq mi (70032160000000000002,160 km2) |
|
| Jefferson County | 065 | Brookville | 1804 | Parts of Lycoming County. Attached to Westmoreland County until 1806 and to Indiana County until 1830. | Thomas Jefferson, third U.S. President | 700445200000000000045,200 | 7002657000000000000657 sq mi (70031702000000000001,702 km2) |
|
| Juniata County | 067 | Mifflintown | 1831 | Parts of Mifflin County. | Juniata River, itself named for the Iroquoian word Onayutta, meaning "Standing Stone" | 700424636000000000024,636 | 7002394000000000000394 sq mi (70031020000000000001,020 km2) |
|
| Lackawanna County | 069 | Scranton | 1878 | Parts of Luzerne County. | Lackawanna River, itself named for the Lenape word meaning "stream that forks" | 7005214437000000000214,437 | 7002465000000000000465 sq mi (70031204000000000001,204 km2) |
|
| Lancaster County | 071 | Lancaster | 1729 | Parts of Chester County. | The English city of Lancaster | 7005519445000000000519,445 | 7002984000000000000984 sq mi (70032549000000000002,549 km2) |
|
| Lawrence County | 073 | New Castle | 1849 | Parts of Beaver and Mercer Counties. | James Lawrence, War of 1812 captain | 700491108000000000091,108 | 7002363000000000000363 sq mi (7002940000000000000940 km2) |
|
| Lebanon County | 075 | Lebanon | 1813 | Parts of Dauphin and Lancaster Counties. | Lebanon, the Biblical term for "White Mountain", which references the piety of the county's Moravian founders | 7005133568000000000133,568 | 7002363000000000000363 sq mi (7002940000000000000940 km2) |
|
| Lehigh County | 077 | Allentown | 1812 | Parts of Northampton County. | Lehigh River | 7005349497000000000349,497 | 7002349000000000000349 sq mi (7002904000000000000904 km2) |
|
| Luzerne County | 079 | Wilkes-Barre | 1786 | Parts of Northumberland County. | Anne-César, Chevalier de la Luzerne, French ambassador to the U.S. who aided republican causes | 7005320918000000000320,918 | 7002907000000000000907 sq mi (70032349000000000002,349 km2) |
|
| Lycoming County | 081 | Williamsport | 1795 | Parts of Northumberland County. | Lycoming Creek, itself named for the Lenape word iacomic meaning "great steam" | 7005116111000000000116,111 | 70031244000000000001,244 sq mi (70033222000000000003,222 km2) |
|
| McKean County | 083 | Smethport | 1804 | Parts 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 Pennsylvania | 700443450000000000043,450 | 7002984000000000000984 sq mi (70032549000000000002,549 km2) |
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| Mercer County | 085 | Mercer | 1800 | Parts of Allegheny County. | Hugh Mercer, Revolutionary War general | 7005116638000000000116,638 | 7002683000000000000683 sq mi (70031769000000000001,769 km2) |
|
| Mifflin County | 087 | Lewistown | 1789 | Parts of Cumberland and Northumberland Counties. | Thomas Mifflin, first Governor of Pennsylvania | 700446682000000000046,682 | 7002415000000000000415 sq mi (70031075000000000001,075 km2) |
|
| Monroe County | 089 | Stroudsburg | 1836 | Parts of Pike and Northampton Counties. | James Monroe, fifth U.S President | 7005169842000000000169,842 | 7002617000000000000617 sq mi (70031598000000000001,598 km2) |
|
| Montgomery County | 091 | Norristown | 1784 | Parts of Philadelphia County. | The historic Welsh county of Montgomeryshire or Richard Montgomery, a general killed in the 1775 Battle of Quebec | 7005799874000000000799,874 | 7002487000000000000487 sq mi (70031261000000000001,261 km2) |
|
| Montour County | 093 | Danville | 1850 | Parts of Columbia County. | Madame Montour, colonial ambassador to the Native Americans | 700418267000000000018,267 | 7002132000000000000132 sq mi (7002342000000000000342 km2) |
|
| Northampton County | 095 | Easton | 1752 | Parts of Bucks County. | The English town of Northampton | 7005297735000000000297,735 | 7002377000000000000377 sq mi (7002976000000000000976 km2) |
|
| Northumberland County | 097 | Sunbury | 1772 | Parts of Lancaster, Berks, Bedford, Cumberland, and Northampton Counties. | The English county of Northumberland | 700494528000000000094,528 | 7002477000000000000477 sq mi (70031235000000000001,235 km2) |
|
| Perry County | 099 | Bloomfield | 1820 | Parts of Cumberland County. | Oliver Hazard Perry, War of 1812 commodore | 700445969000000000045,969 | 7002556000000000000556 sq mi (70031440000000000001,440 km2) |
|
| Philadelphia County | 101 | Philadelphia | 1682 | One of the original counties at the formation of Pennsylvania. | "Brotherly love" from Greek philos ("love") and adelphos ("brother") | 70061526006000000001,526,006 | 7002143000000000000143 sq mi (7002370000000000000370 km2) |
|
| Pike County | 103 | Milford | 1814 | Parts of Wayne County. | Zebulon Pike, explorer of the American West | 700457369000000000057,369 | 7002567000000000000567 sq mi (70031469000000000001,469 km2) |
|
| Potter County | 105 | Coudersport | 1804 | From 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 general | 700417457000000000017,457 | 70031081000000000001,081 sq mi (70032800000000000002,800 km2) |
|
| Schuylkill County | 107 | Pottsville | 1811 | Parts of Berks and Northampton Counties. | Schuylkill River, itself a Dutch corruption of a Lenape word possibly meaning "hidden river" | 7005148289000000000148,289 | 7002778000000000000778 sq mi (70032015000000000002,015 km2) |
|
| Snyder County | 109 | Middleburg | 1855 | Parts of Union County. | Simon Snyder, third Governor of Pennsylvania | 700439702000000000039,702 | 7002332000000000000332 sq mi (7002860000000000000860 km2) |
|
| Somerset County | 111 | Somerset | 1795 | Parts of Bedford County. | The historic English county of Somerset | 700477742000000000077,742 | 70031081000000000001,081 sq mi (70032800000000000002,800 km2) |
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| Sullivan County | 113 | Laporte | 1847 | Parts of Lycoming County; attached to Lycoming until 1848. | John Sullivan, Revolutionary War general | 70036428000000000006,428 | 7002452000000000000452 sq mi (70031171000000000001,171 km2) |
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| Susquehanna County | 115 | Montrose | 1810 | Parts of Luzerne County ; attached to Luzerne County until 1812. | Susquehanna River, itself named after an Algonquin word for "muddy current" | 700443356000000000043,356 | 7002832000000000000832 sq mi (70032155000000000002,155 km2) |
|
| Tioga County | 117 | Wellsboro | 1804 | Parts of Lycoming County; attached to Lycoming until 1812. | Tioga River, itself named for the Lenape word for "forks of the stream" | 700441981000000000041,981 | 70031137000000000001,137 sq mi (70032945000000000002,945 km2) |
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| Union County | 119 | Lewisburg | 1813 | Parts of Northumberland County. | The federal union of the states | 700444947000000000044,947 | 7002317000000000000317 sq mi (7002821000000000000821 km2) |
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| Venango County | 121 | Franklin | 1800 | Parts of Allegheny and Lycoming Counties; attached to until 1805. | A corruption of the Lenape word onenge, meaning "otter" | 700454984000000000054,984 | 7002683000000000000683 sq mi (70031769000000000001,769 km2) |
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| Warren County | 123 | Warren | 1800 | Parts 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 general | 700441815000000000041,815 | 7002898000000000000898 sq mi (70032326000000000002,326 km2) |
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| Washington County | 125 | Washington | 1781 | Parts of Westmoreland County. | George Washington, first U.S. President | 7005207820000000000207,820 | 7002861000000000000861 sq mi (70032230000000000002,230 km2) |
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| Wayne County | 127 | Honesdale | 1798 | Parts of Northampton County. | Anthony Wayne, Revolutionary War general | 700452822000000000052,822 | 7002751000000000000751 sq mi (70031945000000000001,945 km2) |
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| Westmoreland County | 129 | Greensburg | 1773 | Parts of Bedford County. | The historic English county of Westmorland | 7005365169000000000365,169 | 70031036000000000001,036 sq mi (70032683000000000002,683 km2) |
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| Wyoming County | 131 | Tunkhannock | 1842 | Parts of Luzerne County. | The Delaware word xwéːwaməŋk, meaning "at the big river flat" | 700428276000000000028,276 | 7002405000000000000405 sq mi (70031049000000000001,049 km2) |
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| York County | 133 | York | 1749 | Parts of Lancaster County. | The English city of York | 7005434972000000000434,972 | 7002910000000000000910 sq mi (70032357000000000002,357 km2) |
Read more about this topic: List Of Counties In Pennsylvania
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