Maryland Counties by Population (2025)

by Kristen Carney Kristen Carney

Updated: August 7, 2025

The most populous counties in Maryland are Montgomery County with 1,082,273, Prince George's County at 966,629, Baltimore County with 852,425, Anne Arundel County at 602,350, and Baltimore city/county with 568,271. You can get the most current Census population data for all 24 Maryland counties, sorted from the most populous counties in Maryland to the least, according to the 2024 Population Estimates Program.

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Rank County Population
1 Montgomery County 1,082,273
2 Prince George's County 966,629
3 Baltimore County 852,425
4 Anne Arundel County 602,350
5 Baltimore city/county 568,271
6 Howard County 339,668
7 Frederick County 299,317
8 Harford County 265,514
9 Carroll County 177,108
10 Charles County 174,478
11 Washington County 157,228
12 St. Mary's County 116,469
13 Wicomico County 106,329
14 Cecil County 106,305
15 Calvert County 94,913
16 Allegany County 67,097
17 Worcester County 54,337
18 Queen Anne's County 53,688
19 Talbot County 38,244
20 Caroline County 34,248
21 Dorchester County 33,138
22 Garrett County 28,393
23 Somerset County 25,241
24 Kent County 19,557

United States Census Bureau. Annual Estimates of the Resident Population: April 1, 2020 to July 1, 2024. Population Division. May 2025.

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