Hover/click a county for data.

Population of Counties in Pennsylvania (2024)

Download Table Data

Enter your email below, and you'll receive this table's data in your inbox momentarily.

2024 Population
Growth Since 2020
Area (mi²)
Density (/mi²)
Philadelphia County1,534,248-4.15%13411,450Philadelphia County location
Allegheny County1,217,045-2.6%7301,667Allegheny County location
Montgomery County872,4401.8%4831,806Montgomery County location
Bucks County646,4110.04%6041,070Bucks County location
Delaware County577,5670.21%1843,139Delaware County location
Lancaster County560,5181.39%944594Lancaster County location
Chester County552,9303.38%751736Chester County location
York County468,2312.52%904518York County location
Berks County434,0691.26%856507Berks County location
Lehigh County379,2341.26%3451,099Lehigh County location
Westmoreland County350,328-1.13%1K341Westmoreland County location
Luzerne County328,2800.94%890369Luzerne County location
Northampton County320,2822.4%370866Northampton County location
Dauphin County289,7811.07%525552Dauphin County location
Cumberland County272,9444.87%545501Cumberland County location
Erie County266,302-1.58%799333Erie County location
Lackawanna County216,4960.44%459472Lackawanna County location
Washington County210,5240.52%857246Washington County location
Butler County199,4582.77%789253Butler County location
Beaver County165,525-1.4%435381Beaver County location
Monroe County164,655-2.17%608271Monroe County location
Franklin County158,7571.8%772206Franklin County location
Centre County158,0570.05%1.1K143Centre County location
Lebanon County144,6020.92%362399Lebanon County location
Schuylkill County144,3840.99%779185Schuylkill County location
Cambria County129,907-2.48%688189Cambria County location
Fayette County122,462-4.76%791155Fayette County location
Blair County119,812-2.33%525228Blair County location
Lycoming County112,414-1.5%1.2K91Lycoming County location
Mercer County107,869-2.43%673160Mercer County location
Adams County107,5373.6%519207Adams County location
Northumberland County90,117-1.56%458197Northumberland County location
Lawrence County84,132-2.14%357236Lawrence County location
Indiana County83,124-0.03%827101Indiana County location
Crawford County81,597-2.64%1K81Crawford County location
Clearfield County76,356-5.07%1.1K67Clearfield County location
Somerset County71,765-3.05%1.1K67Somerset County location
Columbia County65,5891.4%483136Columbia County location
Carbon County65,4231.04%381172Carbon County location
Armstrong County63,444-3.09%65397Armstrong County location
Pike County61,9185.71%545114Pike County location
Bradford County59,536-0.72%1.1K52Bradford County location
Wayne County51,4400.56%72671Wayne County location
Venango County49,128-2.46%67473Venango County location
Bedford County47,279-0.61%1K47Bedford County location
Perry County46,0530.5%55184Perry County location
Mifflin County45,860-0.6%411112Mifflin County location
Huntingdon County43,731-0.72%87550Huntingdon County location
Jefferson County43,493-2.23%65267Jefferson County location
Union County41,394-2.94%316131Union County location
Tioga County40,713-0.76%1.1K36Tioga County location
Snyder County39,9280.49%329121Snyder County location
McKean County39,219-2.92%98040McKean County location
Susquehanna County38,079-0.7%82346Susquehanna County location
Clinton County37,4380.18%89042Clinton County location
Warren County37,326-3.08%88442Warren County location
Clarion County36,713-1.31%60161Clarion County location
Greene County34,185-4.69%57659Greene County location
Elk County29,929-3.29%82736Elk County location
Wyoming County25,780-0.97%39765Wyoming County location
Juniata County23,205-1.19%39159Juniata County location
Montour County17,666-2.56%130136Montour County location
Potter County15,792-3.61%1.1K15Potter County location
Fulton County14,382-1.35%43833Fulton County location
Forest County6,295-9.53%42715Forest County location
Sullivan County5,823-0.09%45013Sullivan County location
Cameron County4,354-3.82%39611Cameron County location
showing: 67 rows

There are 67 counties in Pennsylvania. Two counties in the state of Pennsylvania have populations of more than one million. These are Philadelphia County, which is coterminous with the city of Philadelphia and has a population of 1,574,765 (even though it is the second smallest county in the state by land area), and Allegheny County, with its 1,227,553 residents. As of 2018, both of these counties have grown their populations since the last census, with Philadelphia County increasing by 3.04% and Allegheny County by a more modest 0.30%.

A number of other counties in Pennsylvania, while not quite as large, still have substantial populations. Montgomery County (820,656), Bucks County (626,751), and Delaware County (563,995) are all in the top five most populous counties in the state, and census statistics show that each of these have also had population increases of between 0.21% and 2.46% in recent years. Conversely, many counties in Pennsylvania have populations of fewer than fifty thousand residents. These include Forest County (7,306), Juniata County (24,475), and Susquehanna County (41,238).

In general, the population increases in Pennsylvania's counties are fairly modest. None have increased by more than 6%, with Cumberland County topping the list at 5.09%, closely followed by Centre County at 5.06%. Quite a number of counties have had negative population growth: Cameron County, the least populous in the state, has just 4,683 residents and its population has decreased by 7.69% since the last census, while the larger Cambria County's population has reduced to 134,313, representing a 6.37% decrease.

Population of Counties in Pennsylvania (2024)

Lists of Counties in all States

  1. Pennsylvania State Data Center
  2. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  3. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  4. American Community Survey (2009 - 2013)
  5. Census QuickFacts
  6. Historical Populations of States and Counties (1790 - 1990)