Data / Rankings / Population density / Counties in Maryland

Counties in Maryland by population density

Baltimore city had the highest population density of 24 counties in 2024, at 2,719.1 inhabitants per km². Garrett County had the lowest, at 16.9 inhabitants per km². The median was 128.8 inhabitants per km² and the figure for Maryland was 248.3 inhabitants per km². Source: the U.S. Census Bureau.

Highest2,719.1Baltimore city
Lowest16.9Garrett County
Median128.824 counties
Maryland248.3History

All counties, 2024

CSVChart (SVG)

Baltimore cityBaltimore city: 2,719.1 inhabitants per km²2,719.1Montgomery CountyMontgomery County: 840.2 inhabitants per km²840.2Prince George's CountyPrince George's County: 771.7 inhabitants per km²771.7Anne Arundel CountyAnne Arundel County: 559.5 inhabitants per km²559.5Baltimore CountyBaltimore County: 547.5 inhabitants per km²547.5Howard CountyHoward County: 519.7 inhabitants per km²519.7Harford CountyHarford County: 234.6 inhabitants per km²234.6Frederick CountyFrederick County: 174.7 inhabitants per km²174.7Calvert CountyCalvert County: 171.4 inhabitants per km²171.4Carroll CountyCarroll County: 152.5 inhabitants per km²152.5Charles CountyCharles County: 147.2 inhabitants per km²147.2Washington CountyWashington County: 132.5 inhabitants per km²132.5St. Mary's CountySt. Mary's County: 125.1 inhabitants per km²125.1Cecil CountyCecil County: 118.8 inhabitants per km²118.8Wicomico CountyWicomico County: 110 inhabitants per km²110Allegany CountyAllegany County: 61.3 inhabitants per km²61.3Queen Anne's CountyQueen Anne's County: 55.8 inhabitants per km²55.8Talbot CountyTalbot County: 55.1 inhabitants per km²55.1Worcester CountyWorcester County: 44.8 inhabitants per km²44.8Caroline CountyCaroline County: 41.2 inhabitants per km²41.2Somerset CountySomerset County: 29.9 inhabitants per km²29.9Kent CountyKent County: 27.2 inhabitants per km²27.2Dorchester CountyDorchester County: 23.7 inhabitants per km²23.7Garrett 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

RankCounties2024
inhabitants per km²		Change on 2023
1Baltimore city2,719.1+0.4%
2Montgomery County840.2+0.8%
3Prince George's County771.7+1%
4Anne Arundel County559.5+0.3%
5Baltimore County547.5+0.2%
6Howard County519.7+0.4%
7Harford County234.6+0.3%
8Frederick County174.7+1.7%
9Calvert County171.4-0.1%
10Carroll County152.5+0.1%
11Charles County147.2+1.4%
12Washington County132.5+1.1%
13St. Mary's County125.1+0.8%
14Cecil County118.8+0.7%
15Wicomico County110+0.6%
16Allegany County61.3-0.1%
17Queen Anne's County55.8+2%
18Talbot County55.1+0.7%
19Worcester County44.8+0.3%
20Caroline County41.2+0.9%
21Somerset County29.9+0.6%
22Kent County27.2+0.4%
23Dorchester County23.7+0.7%
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 2,719.1 inhabitants per km² in 2024, according to the U.S. Census Bureau.

Which county has the lowest population density?

Garrett County, with 16.9 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.

Population density: other rankings

Counties in Maryland: more rankings