The graph below ranks each Pennsylvania County by total residents according to the 2006 census estimates.

Pennsylvania total population by county

CountyTotal Population
PhiladelphiaPhiladelphia County total population - 1,448,3941,448,394  
AlleghenyAllegheny County total population - 1,223,4111,223,411
MontgomeryMontgomery County total population - 775,688775,688
BucksBucks County total population - 623,205623,205
DelawareDelaware County total population - 555,996555,996
LancasterLancaster County total population - 494,486494,486
ChesterChester County total population - 482,112482,112
YorkYork County total population - 416,322416,322
BerksBerks County total population - 401,149401,149
WestmorelandWestmoreland County total population - 366,440366,440
LehighLehigh County total population - 335,544335,544
LuzerneLuzerne County total population - 313,020313,020
NorthamptonNorthampton County total population - 291,306291,306
ErieErie County total population - 279,811279,811
DauphinDauphin County total population - 254,176254,176
CumberlandCumberland County total population - 226,117226,117
LackawannaLackawanna County total population - 209,728209,728
WashingtonWashington County total population - 206,432206,432
ButlerButler County total population - 182,901182,901
BeaverBeaver County total population - 175,736175,736
MonroeMonroe County total population - 165,685165,685
SchuylkillSchuylkill County total population - 147,405147,405
CambriaCambria County total population - 146,967146,967
FayetteFayette County total population - 145,760145,760
CentreCentre County total population - 140,953140,953
FranklinFranklin County total population - 139,991139,991
LebanonLebanon County total population - 126,883126,883
BlairBlair County total population - 126,494126,494
MercerMercer County total population - 118,551118,551
LycomingLycoming County total population - 117,668117,668
AdamsAdams County total population - 101,105101,105
LawrenceLawrence County total population - 91,79591,795
NorthumberlandNorthumberland County total population - 91,65491,654
CrawfordCrawford County total population - 89,38989,389
IndianaIndiana County total population - 88,23488,234
ClearfieldClearfield County total population - 82,44282,442
SomersetSomerset County total population - 78,50878,508
ArmstrongArmstrong County total population - 70,09670,096
ColumbiaColumbia County total population - 65,01465,014
CarbonCarbon County total population - 62,56762,567
BradfordBradford County total population - 62,47162,471
PikePike County total population - 58,19558,195
VenangoVenango County total population - 55,48855,488
WayneWayne County total population - 50,92950,929
BedfordBedford County total population - 49,92749,927
MifflinMifflin County total population - 46,05746,057
HuntingdonHuntingdon County total population - 45,77145,771
JeffersonJefferson County total population - 45,72545,725
PerryPerry County total population - 45,08745,087
McKeanMcKean County total population - 44,06544,065
UnionUnion County total population - 43,38743,387
SusquehannaSusquehanna County total population - 41,88941,889
WarrenWarren County total population - 41,74241,742
TiogaTioga County total population - 41,13741,137
GreeneGreene County total population - 40,43240,432
ClarionClarion County total population - 40,38540,385
SnyderSnyder County total population - 38,22638,226
ClintonClinton County total population - 37,23237,232
ElkElk County total population - 33,17933,179
WyomingWyoming County total population - 28,09328,093
JuniataJuniata County total population - 23,51223,512
MontourMontour County total population - 17,93417,934
PotterPotter County total population - 17,56817,568
FultonFulton County total population - 14,78314,783
ForestForest County total population - 6,5066,506
SullivanSullivan County total population - 6,2776,277
CameronCameron County total population - 5,4895,489

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Pennsylvania population comparison tables
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Asian:
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American Indian:
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Hawaiian & Pacific Islander:
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