USStateMap

Pennsylvania County Map

Pennsylvania has 67 counties. Philadelphia County, which shares its borders with the city of Philadelphia, is the most populous with 1,603,797 people in 2020, and Lycoming County is the largest at 1,228.9 sq mi of land. The capital, Harrisburg, is the seat of Dauphin County.

County map of Pennsylvania showing all 67 counties

County lines are switched on when the interactive map loads, along with Pennsylvania’s largest cities (capital in red). Hover a county to see its name, or untick Show counties to hide them.

67counties
1,603,797Philadelphia County, most populous (2020)
1,228.9 sq miLycoming County, largest by land area
130.2 sq miMontour County, smallest by land area

List of Pennsylvania counties

CountyCounty seatPopulation (2020)Land area (sq mi)
Adams CountyGettysburg103,852518.7
Allegheny CountyPittsburgh1,250,578730.0
Armstrong CountyKittanning65,558653.3
Beaver CountyBeaver168,215434.7
Bedford CountyBedford47,5771,012.2
Berks CountyReading428,849856.4
Blair CountyHollidaysburg122,822525.3
Bradford CountyTowanda59,9671,147.5
Bucks CountyDoylestown646,538604.4
Butler CountyButler193,763789.5
Cambria CountyEbensburg133,472687.5
Cameron CountyEmporium4,547396.2
Carbon CountyJim Thorpe64,749381.3
Centre CountyBellefonte158,1721,108.7
Chester CountyWest Chester534,413750.5
Clarion CountyClarion37,241600.8
Clearfield CountyClearfield80,5621,145.3
Clinton CountyLock Haven37,450888.0
Columbia CountyBloomsburg64,727483.2
Crawford CountyMeadville83,9381,012.4
Cumberland CountyCarlisle259,469545.5
Dauphin CountyHarrisburg286,401524.9
Delaware CountyMedia576,830183.8
Elk CountyRidgway30,990826.9
Erie CountyErie270,876798.9
Fayette CountyUniontown128,804790.8
Forest CountyTionesta6,973427.3
Franklin CountyChambersburg155,932772.3
Fulton CountyMcConnellsburg14,556437.6
Greene CountyWaynesburg35,954575.9
Huntingdon CountyHuntingdon44,092874.7
Indiana CountyIndiana83,246827.4
Jefferson CountyBrookville44,492652.4
Juniata CountyMifflintown23,509391.4
Lackawanna CountyScranton215,896459.0
Lancaster CountyLancaster552,984943.9
Lawrence CountyNew Castle86,070357.4
Lebanon CountyLebanon143,257361.8
Lehigh CountyAllentown374,557345.3
Luzerne CountyWilkes-Barre325,594889.7
Lycoming CountyWilliamsport114,1881,228.9
McKean CountySmethport40,432979.7
Mercer CountyMercer110,652672.5
Mifflin CountyLewistown46,143411.0
Monroe CountyStroudsburg168,327608.4
Montgomery CountyNorristown856,553483.0
Montour CountyDanville18,136130.2
Northampton CountyEaston312,951369.8
Northumberland CountySunbury91,647457.7
Perry CountyNew Bloomfield45,842551.4
Philadelphia CountyPhiladelphia1,603,797134.4
Pike CountyMilford58,535544.9
Potter CountyCoudersport16,3961,081.2
Schuylkill CountyPottsville143,049778.6
Snyder CountyMiddleburg39,736328.8
Somerset CountySomerset74,1291,075.0
Sullivan CountyLaporte5,840449.9
Susquehanna CountyMontrose38,434823.5
Tioga CountyWellsboro41,0451,133.8
Union CountyLewisburg42,681316.0
Venango CountyFranklin50,454674.3
Warren CountyWarren38,587884.3
Washington CountyWashington209,349857.0
Wayne CountyHonesdale51,155725.8
Westmoreland CountyGreensburg354,6631,027.7
Wyoming CountyTunkhannock26,069397.4
York CountyYork456,438904.4

Most populous counties

Pennsylvania had 13,002,700 residents in 2020. The five most populous counties held 37.9% of them:

  1. Philadelphia County: 1,603,797 (12.3% of the state)
  2. Allegheny County: 1,250,578 (9.6% of the state)
  3. Montgomery County: 856,553 (6.6% of the state)
  4. Bucks County: 646,538 (5.0% of the state)
  5. Delaware County: 576,830 (4.4% of the state)

Philadelphia’s four suburban counties, Bucks, Chester, Delaware and Montgomery, had 2,614,334 people together, more than Philadelphia County itself. The least populous county is Cameron County, with 4,547 residents, followed by Sullivan County (5,840) and Forest County (6,973), all rural counties in the northern half of the state.

Largest and smallest counties

Lycoming County, around Williamsport, is the largest county at 1,228.9 sq mi of land. Bradford County (1,147.5 sq mi) and Clearfield County (1,145.3 sq mi) come next. The average Pennsylvania county covers 667.8 sq mi of land.

The smallest county is Montour County, at 130.2 sq mi, followed by Philadelphia County (134.4 sq mi) and Delaware County (183.8 sq mi).

How Pennsylvania counties work

Philadelphia is a consolidated city-county: the city and county were merged in 1854 and share the same boundaries, so there are no other municipalities in Philadelphia County. Everywhere else, counties are divided into separate municipalities such as cities, boroughs and townships.

Most Pennsylvania counties are run by a board of three elected commissioners. A few have adopted home rule charters; Allegheny County, for example, has an elected county executive and county council. Its seat is Pittsburgh.

Printable Pennsylvania county maps

Download the labeled map with every county name, or the blank version for quizzes and coloring; both are SVG files that print sharply at any size.

Labeled county map of Pennsylvania
Labeled SVGBlank SVGState outline PNG

Frequently asked questions

How many counties are in Pennsylvania?

There are 67 counties. Philadelphia County is the most populous and Lycoming County is the largest by land area.

What is the largest county in Pennsylvania?

Lycoming County, with 1,228.9 sq mi of land. By population, the largest is Philadelphia County.

What is the smallest county in Pennsylvania?

Montour County, with 130.2 sq mi of land. The least populous is Cameron County, with 4,547 residents in 2020.

What county is Pittsburgh in?

Allegheny County, which had 1,250,578 residents in 2020, the second most of any Pennsylvania county. Pittsburgh is its county seat.

More maps

Back to the Pennsylvania state map. Neighboring states: Delaware county map · Maryland county map · New Jersey county map · New York county map · Ohio county map · West Virginia county map.

Browse all 50 state maps.

Sources: U.S. Census Bureau (2020 Census, 2020 Gazetteer, boundaries); county seats: Wikipedia and Wikidata. Last reviewed October 2026.