Maryland Population By County in 2021

Updated on August 1, 2024.

Based on the US Census Vintage data estimates, in 2021, the population of Maryland was 6,175,045. Among all Maryland counties, Montgomery had the highest population (1,056,193), followed by Prince George's (956,451), and Baltimore (850,691). Kent was the least populated county (19,244).

Hover over or click on the counties in the map below to see the populations. The data can also be found in a table below. You can use the table to sort, filter, and explore the data further.

You can see similar information for other states and by state for the United States.

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Maryland Population By County in 2021
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Maryland Population By County in 2021
County
Population
% of State Population
Montgomery 1,056,193 17.10
Prince George's 956,451 15.49
Baltimore 850,691 13.78
Anne Arundel 592,085 9.59
Baltimore city 576,578 9.34
Howard 335,328 5.43
Frederick 280,647 4.55
Harford 263,302 4.26
Carroll 174,313 2.82
Charles 168,927 2.74
Washington 155,143 2.51
St. Mary's 114,650 1.86
Wicomico 104,114 1.69
Cecil 104,056 1.69
Calvert 94,233 1.53
Allegany 67,687 1.10
Worcester 53,398 0.87
Queen Anne's 50,922 0.83
Talbot 37,756 0.61
Caroline 33,429 0.54
Dorchester 32,594 0.53
Garrett 28,758 0.47
Somerset 24,546 0.40
Kent 19,244 0.31
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