Data / Rankings / Population density / Counties in Maryland

Counties in Maryland by population density, 2025

Baltimore city had the highest population density of 24 counties in 2025, at 2,718.8 inhabitants per km². Garrett County had the lowest, at 16.9 inhabitants per km². The median was 129.3 inhabitants per km² and the figure for Maryland was 249.1 inhabitants per km². Source: the U.S. Census Bureau.

Highest2,718.8Baltimore city
Lowest16.9Garrett County
Median129.324 counties
Maryland249.1History

All counties, 2025

CSVChart (SVG)

Baltimore cityBaltimore city: 2,718.8 inhabitants per km²2,718.8Montgomery CountyMontgomery County: 841.4 inhabitants per km²841.4Prince George's CountyPrince George's County: 776.3 inhabitants per km²776.3Anne Arundel CountyAnne Arundel County: 561.6 inhabitants per km²561.6Baltimore CountyBaltimore County: 547 inhabitants per km²547Howard CountyHoward County: 521.9 inhabitants per km²521.9Harford CountyHarford County: 235.3 inhabitants per km²235.3Frederick CountyFrederick County: 177 inhabitants per km²177Calvert CountyCalvert County: 171.1 inhabitants per km²171.1Carroll CountyCarroll County: 152.4 inhabitants per km²152.4Charles CountyCharles County: 148.9 inhabitants per km²148.9Washington CountyWashington County: 133 inhabitants per km²133St. Mary's CountySt. Mary's County: 125.6 inhabitants per km²125.6Cecil CountyCecil County: 119.4 inhabitants per km²119.4Wicomico CountyWicomico County: 110.2 inhabitants per km²110.2Allegany CountyAllegany County: 61.1 inhabitants per km²61.1Queen Anne's CountyQueen Anne's County: 56.6 inhabitants per km²56.6Talbot CountyTalbot County: 55 inhabitants per km²55Worcester CountyWorcester County: 44.9 inhabitants per km²44.9Caroline CountyCaroline County: 41.2 inhabitants per km²41.2Somerset CountySomerset County: 30.2 inhabitants per km²30.2Kent CountyKent County: 27.3 inhabitants per km²27.3Dorchester CountyDorchester County: 24 inhabitants per km²24Garrett CountyGarrett County: 16.9 inhabitants per km²16.9
inhabitants per km². Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2025
inhabitants per km²		Change on 2024
1Baltimore city2,718.8-0%
2Montgomery County841.4+0.1%
3Prince George's County776.3+0.6%
4Anne Arundel County561.6+0.4%
5Baltimore County547-0.1%
6Howard County521.9+0.4%
7Harford County235.3+0.3%
8Frederick County177+1.3%
9Calvert County171.1-0.1%
10Carroll County152.4-0.1%
11Charles County148.9+1.2%
12Washington County133+0.4%
13St. Mary's County125.6+0.4%
14Cecil County119.4+0.5%
15Wicomico County110.2+0.2%
16Allegany County61.1-0.2%
17Queen Anne's County56.6+1.4%
18Talbot County55-0.1%
19Worcester County44.9+0.1%
20Caroline County41.2+0.2%
21Somerset County30.2+0.9%
22Kent County27.3+0.2%
23Dorchester County24+1.3%
24Garrett County16.9-0.2%

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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Questions

Which county has the highest population density?

Baltimore city, with 2,718.8 inhabitants per km² in 2025, according to the U.S. Census Bureau.

Which county has the lowest population density?

Garrett County, with 16.9 inhabitants per km² in 2025.

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.

Population density: other rankings

Counties in Maryland: more rankings