Counties in Pennsylvania by population density

Name: Counties in Pennsylvania by population density, 2023
Creator: U.S. Census Bureau
License: Public domain (US federal government work, citation requested)

Philadelphia County had the highest population density of 67 counties in 2023, at 4,500.8 inhabitants per km². Cameron County had the lowest, at 4.3 inhabitants per km². The median was 53.2 inhabitants per km² and the figure for Pennsylvania was 112.3 inhabitants per km². Source: the U.S. Census Bureau.

Highest4,500.8Philadelphia County

Lowest4.3Cameron County

Median53.267 counties

Pennsylvania112.3History

Top 40 counties, 2023

CSV Chart (SVG)

inhabitants per km². Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

Rank	Counties	2023 inhabitants per km²	Change on 2022
1	Philadelphia County	4,500.8	-0.4%
2	Delaware County	1,216.4	+0.4%
3	Montgomery County	695.6	+0.5%
4	Allegheny County	650	-0.4%
5	Lehigh County	424.9	+0.9%
6	Bucks County	413.8	+0.2%
7	Northampton County	335.2	+0.9%
8	Chester County	283.6	+0.8%
9	Lancaster County	229.1	+0.5%
10	Dauphin County	214	+0.7%
11	York County	199	+1%
12	Berks County	196.1	+0.7%
13	Cumberland County	191.9	+1%
14	Lackawanna County	182	+0.3%
15	Lebanon County	154.4	+0.5%
16	Beaver County	147.2	-0%
17	Luzerne County	142.6	+0.6%
18	Westmoreland County	132	-0.2%
19	Erie County	129.3	-0.5%
20	Monroe County	105.8	-0.4%
21	Butler County	97.2	+0.7%
22	Washington County	94.8	+0.2%
23	Lawrence County	91.3	-0.3%
24	Blair County	88.5	-0.3%
25	Adams County	79.6	+0.9%
26	Franklin County	79.1	+0.7%
27	Northumberland County	76	+0.1%
28	Cambria County	73.3	-0.6%
29	Schuylkill County	71.3	+0.5%
30	Carbon County	66.3	-0.1%
31	Mercer County	62.3	-0.5%
32	Fayette County	60.9	-0.7%
33	Centre County	55.4	+0.5%
34	Montour County	53.2	-0.8%
35	Columbia County	52.5	+0.6%
36	Union County	51.6	-1.2%
37	Snyder County	46.6	+0.4%
38	Pike County	43.6	+1.3%
39	Mifflin County	43.2	-0%
40	Indiana County	38.8	+0.2%
41	Armstrong County	37.9	-0.9%
42	Lycoming County	35.6	-0%
43	Perry County	32.4	+0.3%
44	Crawford County	31.3	-0.4%
45	Venango County	28.3	-0.4%
46	Wayne County	27.3	+0.5%
47	Clearfield County	26.4	+0.6%
48	Somerset County	26	-0.4%
49	Jefferson County	25.8	-0.2%
50	Wyoming County	25.2	-0.5%
51	Clarion County	23.7	-0.9%
52	Greene County	23.2	0%
53	Juniata County	23.1	+0.5%
54	Bradford County	20.1	-0.2%
55	Huntingdon County	19.2	+0.6%
56	Bedford County	18.1	+0.2%
57	Susquehanna County	17.9	+0.1%
58	Warren County	16.4	-0.5%
59	Clinton County	16.4	-0.2%
60	McKean County	15.6	-0.6%
61	Elk County	14.1	-0.8%
62	Tioga County	13.9	-0.6%
63	Fulton County	12.8	-0.2%
64	Forest County	5.9	-2.1%
65	Potter County	5.7	-1%
66	Sullivan County	5.1	+0.4%
67	Cameron County	4.3	-0.5%

Other periods

About this ranking

Resident population divided by land area in km². World Bank figures use mid-year population and land area excluding inland water.

United States: Census Bureau population estimates for 1 July divided by land area (water excluded) from the latest Census Gazetteer files. US tables often give people per square mile; multiply persons per km² by 2.59 to compare.

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. Population Estimates Program resident population on 1 July divided by land area from the latest Census Gazetteer files, persons per km². https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-09.

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Rank Counties in Pennsylvania by population density using official data, and cite the source.

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Questions

Which county has the highest population density?

Philadelphia County, with 4,500.8 inhabitants per km² in 2023, according to the U.S. Census Bureau.

Which county has the lowest population density?

Cameron County, with 4.3 inhabitants per km² in 2023.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Population Estimates Program resident population on 1 July divided by land area from the latest Census Gazetteer files, persons per km². Retrieved 2026-10-09.