Data / Rankings / Households / Counties in Pennsylvania

Counties in Pennsylvania by households

Philadelphia County had the highest households of 67 counties in 2021, at 646,608. Forest County had the lowest, at 1,786. The median was 33,225 and the figure for Pennsylvania was 5.15 million. Source: the U.S. Census Bureau.

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Highest646,608Philadelphia County
Lowest1,786Forest County
Median33,22567 counties
Pennsylvania5,147,783History

Map of counties, 2021

Adams County: 39,908 countAllegheny County: 545,763 countArmstrong County: 27,704 countBeaver County: 71,717 countBedford County: 19,334 countBerks County: 160,065 countBlair County: 50,264 countBradford County: 24,287 countBucks County: 245,200 countButler County: 78,365 countCambria County: 55,519 countCameron County: 2,131 countCarbon County: 26,312 countCentre County: 57,834 countChester County: 198,159 countClarion County: 14,632 countClearfield County: 31,195 countClinton County: 14,620 countColumbia County: 25,717 countCrawford County: 33,225 countCumberland County: 102,532 countDauphin County: 115,703 countDelaware County: 214,252 countElk County: 13,499 countErie County: 108,861 countFayette County: 54,097 countForest County: 1,786 countFranklin County: 61,854 countFulton County: 5,990 countGreene County: 13,957 countHuntingdon County: 15,588 countIndiana County: 32,425 countJefferson County: 17,745 countJuniata County: 8,756 countLackawanna County: 87,217 countLancaster County: 207,291 countLawrence County: 36,111 countLebanon County: 54,758 countLehigh County: 141,775 countLuzerne County: 131,556 countLycoming County: 45,504 countMcKean County: 15,776 countMercer County: 45,798 countMifflin County: 18,641 countMonroe County: 59,208 countMontgomery County: 327,065 countMontour County: 7,476 countNorthampton County: 119,208 countNorthumberland County: 37,369 countPerry County: 17,823 countPhiladelphia County: 646,608 countPike County: 23,351 countPotter County: 6,385 countSchuylkill County: 56,763 countSnyder County: 14,373 countSomerset County: 28,857 countSullivan County: 2,398 countSusquehanna County: 15,430 countTioga County: 16,340 countUnion County: 13,880 countVenango County: 21,033 countWarren County: 16,070 countWashington County: 86,028 countWayne County: 19,379 countWestmoreland County: 152,288 countWyoming County: 10,600 countYork County: 176,428 count
  • Under 14K
  • 14K to 19K
  • 19K to 33K
  • 33K to 58K
  • 58K to 130K
  • 130K and over
count, 2021. Source: U.S. Census Bureau, American Community Survey 5-year estimates, table B25003: occupied housing units (households). Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2021

Philadelphia County: 646,608 countPhiladelphia County646,608Allegheny County: 545,763 countAllegheny County545,763Montgomery County: 327,065 countMontgomery County327,065Bucks County: 245,200 countBucks County245,200Delaware County: 214,252 countDelaware County214,252Lancaster County: 207,291 countLancaster County207,291Chester County: 198,159 countChester County198,159York County: 176,428 countYork County176,428Berks County: 160,065 countBerks County160,065Westmoreland County: 152,288 countWestmoreland County152,288Lehigh County: 141,775 countLehigh County141,775Luzerne County: 131,556 countLuzerne County131,556Northampton County: 119,208 countNorthampton County119,208Dauphin County: 115,703 countDauphin County115,703Erie County: 108,861 countErie County108,861Cumberland County: 102,532 countCumberland County102,532Lackawanna County: 87,217 countLackawanna County87,217Washington County: 86,028 countWashington County86,028Butler County: 78,365 countButler County78,365Beaver County: 71,717 countBeaver County71,717Franklin County: 61,854 countFranklin County61,854Monroe County: 59,208 countMonroe County59,208Centre County: 57,834 countCentre County57,834Schuylkill County: 56,763 countSchuylkill County56,763Cambria County: 55,519 countCambria County55,519Lebanon County: 54,758 countLebanon County54,758Fayette County: 54,097 countFayette County54,097Blair County: 50,264 countBlair County50,264Mercer County: 45,798 countMercer County45,798Lycoming County: 45,504 countLycoming County45,504Adams County: 39,908 countAdams County39,908Northumberland County: 37,369 countNorthumberland County37,369Lawrence County: 36,111 countLawrence County36,111Crawford County: 33,225 countCrawford County33,225Indiana County: 32,425 countIndiana County32,425Clearfield County: 31,195 countClearfield County31,195Somerset County: 28,857 countSomerset County28,857Armstrong County: 27,704 countArmstrong County27,704Carbon County: 26,312 countCarbon County26,312Columbia County: 25,717 countColumbia County25,717Philadelphia County: 646,608 countPhiladelphia County646,608Allegheny County: 545,763 countAllegheny County545,763Montgomery County: 327,065 countMontgomery County327,065Bucks County: 245,200 countBucks County245,200Delaware County: 214,252 countDelaware County214,252Lancaster County: 207,291 countLancaster County207,291Chester County: 198,159 countChester County198,159York County: 176,428 countYork County176,428Berks County: 160,065 countBerks County160,065Westmoreland County: 152,288 countWestmoreland County152,288Lehigh County: 141,775 countLehigh County141,775Luzerne County: 131,556 countLuzerne County131,556Northampton County: 119,208 countNorthampton County119,208Dauphin County: 115,703 countDauphin County115,703Erie County: 108,861 countErie County108,861Cumberland County: 102,532 countCumberland County102,532Lackawanna County: 87,217 countLackawanna County87,217Washington County: 86,028 countWashington County86,028Butler County: 78,365 countButler County78,365Beaver County: 71,717 countBeaver County71,717Franklin County: 61,854 countFranklin County61,854Monroe County: 59,208 countMonroe County59,208Centre County: 57,834 countCentre County57,834Schuylkill County: 56,763 countSchuylkill County56,763Cambria County: 55,519 countCambria County55,519Lebanon County: 54,758 countLebanon County54,758Fayette County: 54,097 countFayette County54,097Blair County: 50,264 countBlair County50,264Mercer County: 45,798 countMercer County45,798Lycoming County: 45,504 countLycoming County45,504Adams County: 39,908 countAdams County39,908Northumberland County: 37,369 countNorthumberland County37,369Lawrence County: 36,111 countLawrence County36,111Crawford County: 33,225 countCrawford County33,225Indiana County: 32,425 countIndiana County32,425Clearfield County: 31,195 countClearfield County31,195Somerset County: 28,857 countSomerset County28,857Armstrong County: 27,704 countArmstrong County27,704Carbon County: 26,312 countCarbon County26,312Columbia County: 25,717 countColumbia County25,717
count. Source: U.S. Census Bureau, American Community Survey 5-year estimates, table B25003: occupied housing units (households). Retrieved 2026-10-12.

Full ranking

RankCounties2021
count
1Philadelphia County646,608
2Allegheny County545,763
3Montgomery County327,065
4Bucks County245,200
5Delaware County214,252
6Lancaster County207,291
7Chester County198,159
8York County176,428
9Berks County160,065
10Westmoreland County152,288
11Lehigh County141,775
12Luzerne County131,556
13Northampton County119,208
14Dauphin County115,703
15Erie County108,861
16Cumberland County102,532
17Lackawanna County87,217
18Washington County86,028
19Butler County78,365
20Beaver County71,717
21Franklin County61,854
22Monroe County59,208
23Centre County57,834
24Schuylkill County56,763
25Cambria County55,519
26Lebanon County54,758
27Fayette County54,097
28Blair County50,264
29Mercer County45,798
30Lycoming County45,504
31Adams County39,908
32Northumberland County37,369
33Lawrence County36,111
34Crawford County33,225
35Indiana County32,425
36Clearfield County31,195
37Somerset County28,857
38Armstrong County27,704
39Carbon County26,312
40Columbia County25,717
41Bradford County24,287
42Pike County23,351
43Venango County21,033
44Wayne County19,379
45Bedford County19,334
46Mifflin County18,641
47Perry County17,823
48Jefferson County17,745
49Tioga County16,340
50Warren County16,070
51McKean County15,776
52Huntingdon County15,588
53Susquehanna County15,430
54Clarion County14,632
55Clinton County14,620
56Snyder County14,373
57Greene County13,957
58Union County13,880
59Elk County13,499
60Wyoming County10,600
61Juniata County8,756
62Montour County7,476
63Potter County6,385
64Fulton County5,990
65Sullivan County2,398
66Cameron County2,131
67Forest County1,786

Other periods

About this ranking

Number of households, which equals the number of occupied housing units. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

People living in group quarters, such as college dormitories, nursing homes and prisons, are not in households.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. American Community Survey 5-year estimates, table B25003: occupied housing units (households). https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25003.dat. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Census Bureau. (2026). American Community Survey 5-year estimates, table B25003: occupied housing units (households) (Counties in Pennsylvania by households, 2021) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25003.dat

MLA 9

American Community Survey 5-year estimates, table B25003: occupied housing units (households), Counties in Pennsylvania by households, 2021. U.S. Census Bureau, 29 Jan. 2026, https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25003.dat. Invokely, https://invokely.ai/rankings/households/pennsylvania-counties?period=2021. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. American Community Survey 5-year estimates, table B25003: occupied housing units (households). Counties in Pennsylvania by households, 2021. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25003.dat. Also distributed by Invokely, https://invokely.ai/rankings/households/pennsylvania-counties?period=2021.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B25003: occupied housing units (households), Counties in Pennsylvania by households, 2021 [Dataset]. Available at: https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25003.dat, via Invokely: https://invokely.ai/rankings/households/pennsylvania-counties?period=2021 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_pennsylvania_by_2021,
  author = {{U.S. Census Bureau}},
  title = {{American Community Survey 5-year estimates, table B25003: occupied housing units (households): Counties in Pennsylvania by households, 2021}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25003.dat},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/households/pennsylvania-counties?period=2021. Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B25003: occupied housing units (households). https://www2.census.gov/programs-surveys/acs/summary\_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25003.dat. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - American Community Survey 5-year estimates, table B25003: occupied housing units (households): Counties in Pennsylvania by households, 2021
PY  - 2026
DA  - 2026/01/29
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25003.dat
L2  - https://invokely.ai/rankings/households/pennsylvania-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/households/pennsylvania-counties?period=2021.
N1  - Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B25003: occupied housing units (households). https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b25003.dat. Retrieved 2026-10-12.
ER  -
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Questions

Which county has the highest households?

Philadelphia County, with 646,608 in 2021, according to the U.S. Census Bureau.

Which county has the lowest households?

Forest County, with 1,786 in 2021.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, American Community Survey 5-year estimates, table B25003: occupied housing units (households). Retrieved 2026-10-12.

Households: other rankings

Counties in Pennsylvania: more rankings