Counties in Maryland by population

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

Montgomery County had the highest population of 24 counties in 2023, at 1.06 million. Kent County had the lowest, at 19,448. The median was 110,633 and the figure for Maryland was 6.2 million. Source: the U.S. Census Bureau.

Highest1,064,369Montgomery County

Lowest19,448Kent County

Median110,63324 counties

Maryland6,204,927History

All counties, 2023

CSV Chart (SVG)

persons. Source: U.S. Census Bureau. Retrieved 2026-10-08.

Full ranking

Rank	Counties	2023 persons	Change on 2022
1	Montgomery County	1,064,369	+0.6%
2	Prince George's County	954,813	+0.3%
3	Baltimore County	846,378	-0.2%
4	Anne Arundel County	599,327	+0.2%
5	Baltimore city	567,952	-0.4%
6	Howard County	336,321	+0.1%
7	Frederick County	293,742	+2%
8	Harford County	264,739	+0.4%
9	Carroll County	176,625	+0.6%
10	Charles County	172,174	+1.1%
11	Washington County	155,437	+0.6%
12	St. Mary's County	115,242	+0.3%
13	Wicomico County	106,024	+0.8%
14	Cecil County	105,789	+0.8%
15	Calvert County	94,753	+0.1%
16	Allegany County	67,084	+0.1%
17	Worcester County	54,237	+0.5%
18	Queen Anne's County	52,624	+1.6%
19	Talbot County	38,019	+0.3%
20	Caroline County	33,768	+0.7%
21	Dorchester County	32,981	+1.2%
22	Garrett County	28,485	-0.3%
23	Somerset County	24,596	+2%
24	Kent County	19,448	+0.5%

Other periods

About this ranking

Resident population. Spain and the EU: 1 January, with Spanish figures from the official municipal register (Padrón). United States: Census Bureau population estimates for 1 July. Other countries and the World: World Bank mid-year estimates, which count all residents regardless of legal status or citizenship.

For Denmark, Statistics Denmark counts the registered resident population on 1 January. Greenland and the Faroe Islands are excluded. The annual series selects the first-quarter reference date from FOLK1A. The World Bank series exists for every country, so use it (through compare) to rank countries on one basis.

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. Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program). https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-08.

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

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Questions

Which county has the highest population?

Montgomery County, with 1.06 million in 2023, according to the U.S. Census Bureau.

Which county has the lowest population?

Kent County, with 19,448 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, Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program). Retrieved 2026-10-08.