County Maps US

Pennsylvania County Map

Pennsylvania has 67 counties. Together they cover 44,742 sq mi of land and 13,059,432 people.

Neighbouring areas are given different colours so their shared borders read clearly. These colours carry no data.

Boundaries from the 2025 Census cartographic boundary file, generalised so that no point moves by more than half a pixel at this width. Select any area to open its page.
Counties
67
22nd most of the 51 states and DC
Population
13,059,432
5th largest
Land area
44,742
square miles
Density
291.9
people per square mile, computed

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025. Retrieved 30 August 2026.

Download this map

Free to use and redistribute. The boundaries are public-domain Census Bureau data; attribution to County Maps US is appreciated but not required.

Satellite view

Aerial imagery of Pennsylvania with the state boundary drawn on top. County lines are not drawn here: at this scale they would bury the picture, and the map above already carries them.

Aerial view of Pennsylvania from the USGS National Map, with its boundary outlined
Imagery: USGS National Map, USGS Imagery Only, public domain, requested from USGS by your browser when you reach this point on the page, at 800 by 500 pixels. The boundary is the 2025 Census cartographic boundary file, reprojected to Web Mercator to match the imagery. You can also open the USGS National Map viewer.

The extremes of Pennsylvania

Most populous

Philadelphia County

1,574,281

Least populous

Cameron County

4,211

Largest by land area

Lycoming County

1,229 sq mi

Smallest by land area

Montour County

130.3 sq mi

Most densely populated

Philadelphia County

11,720 per sq mi

Highest median household income

Chester County

$127,208

Which is the largest county in Pennsylvania? The answer depends on whether you mean area or population.

The counties, by shape

Every one, drawn to its own scale so the small ones stay recognisable. Shape alone is not a size comparison; the table below carries the areas.

What the map does not say

The counties of Pennsylvania are nowhere near the same size. Lycoming County covers 1,229 sq mi of land, 9.4 times the 130.3 sq mi of Montour County. People are spread even less evenly: Philadelphia County packs 11,720 per sq mi while Cameron County holds 10.6 per sq mi.

They were not drawn in one sitting either. Philadelphia County dates to 1682, and the boundaries were still being redrawn when Lackawanna County was organised in 1878, 196 years later. Founding years come from Wikidata and are worth checking against the county's own history before citing.

Water is part of the picture too: 48.7% of Erie County is water, the most in the state, which is why its land area and total area disagree. And 42 of the 67 counties here share their names with counties in other states, so searching by name alone can land in the wrong place; the A to Z index lists every duplicate.

All 67 counties of Pennsylvania

Sortable on any column. This table doubles as the text alternative to the map above: every area is a link, in alphabetical order, whether or not the map renders.

The 67 counties of Pennsylvania, with population, land area, density, median household income, county seat and FIPS code.
NamePopulationLand areaDensityMedian incomeSeatFIPS
Adams County107,594518.6 sq mi207 per sq mi$84,092Gettysburg42001
Allegheny County1,225,035730 sq mi1,678 per sq mi$78,548Pittsburgh42003
Armstrong County63,698653.3 sq mi97.5 per sq mi$65,008Kittanning42005
Beaver County166,032434.7 sq mi382 per sq mi$71,089Beaver42007
Bedford County47,4801,012 sq mi46.9 per sq mi$59,992Bedford42009
Berks County440,072856.4 sq mi514 per sq mi$79,777Reading42011
Blair County119,541525.1 sq mi228 per sq mi$62,382Hollidaysburg42013
Bradford County59,6001,147 sq mi51.9 per sq mi$63,675Towanda42015
Bucks County647,828604.4 sq mi1,072 per sq mi$114,764Doylestown42017
Butler County200,169789.5 sq mi254 per sq mi$89,843Butler42019
Cambria County128,968688 sq mi187 per sq mi$58,418Ebensburg42021
Cameron County4,211396.2 sq mi10.6 per sq mi$50,573Emporium42023
Carbon County65,868381.4 sq mi173 per sq mi$67,554Jim Thorpe42025
Centre County157,3931,107 sq mi142 per sq mi$74,291Bellefonte42027
Chester County557,116750.6 sq mi742 per sq mi$127,208West Chester42029
Clarion County36,680600.8 sq mi61.0 per sq mi$62,649Clarion42031
Clearfield County78,1001,145 sq mi68.2 per sq mi$62,152Clearfield42033
Clinton County37,870889.6 sq mi42.6 per sq mi$60,816Lock Haven42035
Columbia County66,193483.3 sq mi137 per sq mi$64,644Bloomsburg42037
Crawford County81,7921,012 sq mi80.8 per sq mi$60,476Meadville42039
Cumberland County277,270545.5 sq mi508 per sq mi$87,494Carlisle42041
Dauphin County293,351524.9 sq mi559 per sq mi$76,242Harrisburg42043
Delaware County580,937183.8 sq mi3,161 per sq mi$89,546Media42045
Elk County29,926826.9 sq mi36.2 per sq mi$66,380Ridgway42047
Erie County265,832798.9 sq mi333 per sq mi$63,354Erie42049
Fayette County123,021790.8 sq mi156 per sq mi$58,236Uniontown42051
Forest County6,614427.3 sq mi15.5 per sq mi$52,191Tionesta42053
Franklin County160,652772.3 sq mi208 per sq mi$77,003Chambersburg42055
Fulton County14,483437.6 sq mi33.1 per sq mi$65,836McConnellsburg42057
Greene County33,885575.9 sq mi58.8 per sq mi$68,041Waynesburg42059
Huntingdon County43,001874.6 sq mi49.2 per sq mi$65,557Huntingdon42061
Indiana County82,878827.4 sq mi100 per sq mi$60,208Indiana42063
Jefferson County43,255652.4 sq mi66.3 per sq mi$58,686Brookville42065
Juniata County23,403391.4 sq mi59.8 per sq mi$66,318Mifflintown42067
Lackawanna County216,502458.9 sq mi472 per sq mi$66,223Scranton42069
Lancaster County563,159943.9 sq mi597 per sq mi$86,959Lancaster42071
Lawrence County83,911357.4 sq mi235 per sq mi$61,931New Castle42073
Lebanon County146,380361.8 sq mi405 per sq mi$78,425Lebanon42075
Lehigh County384,383345.3 sq mi1,113 per sq mi$80,079Allentown42077
Luzerne County332,126889.8 sq mi373 per sq mi$63,691Wilkes-Barre42079
Lycoming County112,5871,229 sq mi91.6 per sq mi$63,917Williamsport42081
McKean County38,984979.7 sq mi39.8 per sq mi$62,905Smethport42083
Mercer County107,860672.5 sq mi160 per sq mi$59,976Mercer42085
Mifflin County46,127411 sq mi112 per sq mi$63,953Lewistown42087
Monroe County167,179608.4 sq mi275 per sq mi$83,565Stroudsburg42089
Montgomery County877,643482.9 sq mi1,817 per sq mi$113,915Norristown42091
Montour County17,868130.3 sq mi137 per sq mi$76,976Danville42093
Northampton County324,411369.8 sq mi877 per sq mi$89,184Easton42095
Northumberland County89,920457.7 sq mi196 per sq mi$60,583Sunbury42097
Perry County46,806551.5 sq mi84.9 per sq mi$79,444Bloomfield42099
Philadelphia County1,574,281134.3 sq mi11,720 per sq mi$61,953Philadelphia42101
Pike County62,808544.9 sq mi115 per sq mi$81,323Milford42103
Potter County15,8971,081 sq mi14.7 per sq mi$59,020Coudersport42105
Schuylkill County145,085778.8 sq mi186 per sq mi$68,313Pottsville42107
Snyder County39,655328.8 sq mi121 per sq mi$66,876Middleburg42109
Somerset County72,0041,075 sq mi67.0 per sq mi$61,446Somerset42111
Sullivan County5,856449.9 sq mi13.0 per sq mi$69,764Laporte42113
Susquehanna County38,237823.5 sq mi46.4 per sq mi$68,487Montrose42115
Tioga County40,5021,134 sq mi35.7 per sq mi$64,899Wellsboro42117
Union County42,313316 sq mi134 per sq mi$76,404Lewisburg42119
Venango County49,346674.3 sq mi73.2 per sq mi$61,522Franklin42121
Warren County37,038884.3 sq mi41.9 per sq mi$60,480Warren42123
Washington County210,802857 sq mi246 per sq mi$78,958Washington42125
Wayne County51,703725.8 sq mi71.2 per sq mi$62,381Honesdale42127
Westmoreland County349,3241,028 sq mi340 per sq mi$74,109Greensburg42129
Wyoming County25,790397.3 sq mi64.9 per sq mi$72,460Tunkhannock42131
York County473,197904.4 sq mi523 per sq mi$84,829York42133

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; US Census Bureau, American Community Survey, American Community Survey 2020-2024 5-Year Estimates, released 29 January 2026; Wikidata (CC0), Wikidata. Retrieved 30 August 2026.

The ten most populous

  1. Philadelphia County1,574,281
  2. Allegheny County1,225,035
  3. Montgomery County877,643
  4. Bucks County647,828
  5. Delaware County580,937
  6. Lancaster County563,159
  7. Chester County557,116
  8. York County473,197
  9. Berks County440,072
  10. Lehigh County384,383

Data on this page last rebuilt 30 August 2026. How these figures are produced.