Counties in Pennsylvania by population density

Name: Counties in Pennsylvania by population density, 2024
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 2024, at 4,520.6 inhabitants per km². Cameron County had the lowest, at 4.2 inhabitants per km². The median was 53 inhabitants per km² and the figure for Pennsylvania was 112.6 inhabitants per km². Source: the U.S. Census Bureau.

Highest4,520.6Philadelphia County

Lowest4.2Cameron County

Median5367 counties

Pennsylvania112.6History

Top 40 counties, 2024

CSV Chart (SVG)

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

Full ranking

Rank	Counties	2024 inhabitants per km²	Change on 2023
1	Philadelphia County	4,520.6	+0.4%
2	Delaware County	1,221.3	+0.4%
3	Montgomery County	699.7	+0.6%
4	Allegheny County	649.1	-0.1%
5	Lehigh County	428.1	+0.8%
6	Bucks County	414.2	+0.1%
7	Northampton County	337.3	+0.7%
8	Chester County	285.3	+0.6%
9	Lancaster County	229.9	+0.3%
10	Dauphin County	215.5	+0.7%
11	York County	200.7	+0.8%
12	Berks County	197.6	+0.8%
13	Cumberland County	194.4	+1.3%
14	Lackawanna County	182.1	+0.1%
15	Lebanon County	155.1	+0.5%
16	Beaver County	147.2	+0.1%
17	Luzerne County	143.6	+0.7%
18	Westmoreland County	131.7	-0.2%
19	Erie County	128.8	-0.4%
20	Monroe County	105.9	0%
21	Butler County	97.5	+0.3%
22	Washington County	94.9	+0.1%
23	Lawrence County	90.8	-0.5%
24	Blair County	88.3	-0.3%
25	Adams County	79.8	+0.2%
26	Franklin County	79.7	+0.8%
27	Northumberland County	75.9	-0.2%
28	Cambria County	72.9	-0.5%
29	Schuylkill County	71.6	+0.4%
30	Carbon County	66.5	+0.4%
31	Mercer County	62.1	-0.3%
32	Fayette County	60.5	-0.6%
33	Centre County	55.3	-0.1%
34	Montour County	53	-0.4%
35	Columbia County	52.7	+0.3%
36	Union County	52.1	+1.1%
37	Snyder County	46.6	0%
38	Pike County	44.1	+1.2%
39	Mifflin County	43.2	+0.1%
40	Indiana County	38.9	+0.3%
41	Armstrong County	37.7	-0.6%
42	Lycoming County	35.5	-0.2%
43	Perry County	32.6	+0.6%
44	Crawford County	31.3	-0.1%
45	Venango County	28.4	+0.1%
46	Wayne County	27.3	-0%
47	Clearfield County	26.3	-0.3%
48	Somerset County	25.9	-0.1%
49	Jefferson County	25.6	-0.7%
50	Wyoming County	25.1	-0.2%
51	Clarion County	23.6	-0.6%
52	Juniata County	23.1	+0.2%
53	Greene County	22.9	-1.3%
54	Bradford County	20.1	-0.2%
55	Huntingdon County	19.2	-0.3%
56	Bedford County	18.1	+0.2%
57	Susquehanna County	17.9	-0%
58	Clinton County	16.4	-0%
59	Warren County	16.3	-0.8%
60	McKean County	15.5	-0.7%
61	Elk County	14	-0.4%
62	Tioga County	13.8	-0.3%
63	Fulton County	12.8	-0.3%
64	Forest County	6	+1.9%
65	Potter County	5.7	-0.2%
66	Sullivan County	5.1	-0.3%
67	Cameron County	4.2	-1.1%

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 4,520.6 inhabitants per km² in 2024, according to the U.S. Census Bureau.

Which county has the lowest population density?

Cameron County, with 4.2 inhabitants per km² in 2024.

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.