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List of Pennsylvania Counties and County Seats

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The U.S. state of Pennsylvania is divided into 67 counties. Explore list of California Counties and their County Seats in alphabetical order and check their population, areas and the date of formation.

List of Pennsylvania Counties and County Seat

S.NCountyCounty SeatPopulation(2011)Area Formed
1Adams CountyGettysburg101,407522 sq mi1800
2Allegheny CountyPittsburgh1,223,348745 sq mi1788
3Armstrong CountyKittanning68,941664 sq mi1800
4Beaver CountyBeaver170,539444 sq mi1800
5Bedford CountyBedford49,7621,015 sq mi1771
6Berks CountyReading411,442866 sq mi1752
7Blair CountyHollidaysburg127,089527 sq mi1846
8Bradford CountyTowanda62,6221,161 sq mi1810
9Bucks CountyDoylestown625,249622 sq mi1682
10Butler CountyButler183,862795 sq mi1800
11Cambria CountyEbensburg143,679693 sq mi1804
12Cameron CountyEmporium5,085399 sq mi1860
13Carbon CountyJim Thorpe65,249387 sq mi1843
14Centre CountyBellefonte153,9901,112 sq mi1800
15Chester CountyWest Chester498,886760 sq mi1682
16Clarion CountyClarion39,988609 sq mi1839
17Clearfield CountyClearfield81,6421,154 sq mi1804
18Clinton CountyLock Haven39,238898 sq mi1839
19Columbia CountyBloomsburg67,295490 sq mi1813
20Crawford CountyMeadville88,7651,038 sq mi1800
21Cumberland CountyCarlisle235,406551 sq mi1750
22Dauphin CountyHarrisburg268,100558 sq mi1785
23Delaware CountyMedia558,979191 sq mi1789
24Elk CountyRidgway31,946832 sq mi1843
25Erie CountyErie280,566799 sq mi1800
26Fayette CountyUniontown136,606798 sq mi1783
27Forest CountyTionesta7,716431 sq mi1848
28Franklin CountyChambersburg149,618771 sq mi1784
29Fulton CountyMcConnellsburg14,845438 sq mi1850
30Greene CountyWaynesburg38,686578 sq mi1796
31Huntingdon CountyHuntingdon45,913889 sq mi1787
32Indiana CountyIndiana88,880834 sq mi1803
33Jefferson CountyBrookville45,200657 sq mi1804
34Juniata CountyMifflintown24,636394 sq mi1831
35Lackawanna CountyScranton214,437465 sq mi1878
36Lancaster CountyLancaster519,445984 sq mi1729
37Lawrence CountyNew Castle91,108363 sq mi1849
38Lebanon CountyLebanon133,568363 sq mi1813
39Lehigh CountyAllentown349,497349 sq mi1812
40Luzerne CountyWilkes-Barre320,918907 sq mi1786
41Lycoming CountyWilliamsport116,1111,244 sq mi1795
42McKean CountySmethport43,450984 sq mi1804
43Mercer CountyMercer116,638683 sq mi1800
44Mifflin CountyLewistown46,682415 sq mi1789
45Monroe CountyStroudsburg169,842617 sq mi1836
46Montgomery CountyNorristown799,874487 sq mi1784
47Montour CountyDanville18,267132 sq mi1850
48Northampton CountyEaston297,735377 sq mi1752
49Northumberland CountySunbury94,528477 sq mi1772
50Perry CountyNew Bloomfield45,969556 sq mi1820
51Philadelphia CountyPhiladelphia1,526,006143 sq mi1682
52Pike CountyMilford57,369567 sq mi1814
53Potter CountyCoudersport17,4571,081 sq mi1804
54Schuylkill CountyPottsville148,289778 sq mi1811
55Snyder CountyMiddleburg39,702332 sq mi1855
56Somerset CountySomerset77,7421,081 sq mi1795
57Sullivan CountyLaporte6,428452 sq mi1847
58Susquehanna CountyMontrose43,356832 sq mi1810
59Tioga CountyWellsboro41,9811,137 sq mi1804
60Union CountyLewisburg44,947317 sq mi1813
61Venango CountyFranklin54,984683 sq mi1800
62Warren CountyWarren41,815898 sq mi1800
63Washington CountyWashington207,820861 sq mi1781
64Wayne CountyHonesdale52,822751 sq mi1798
65Westmoreland CountyGreensburg365,1691,036 sq mi1773
66Wyoming CountyTunkhannock28,276405 sq mi1842
67York CountyYork434,972910 sq mi1749