Maryland Population By County in 2020

Updated on August 1, 2024.

Based on the US Census Vintage data estimates, in 2020, the population of Maryland was 6,173,689. Among all Maryland counties, Montgomery had the highest population (1,060,904), followed by Prince George's (965,365), and Baltimore (853,387). Kent was the least populated county (19,120).

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 2020
Maryland Population By County in 2020
County
Population
% of State Population
Montgomery 1,060,904 17.18
Prince George's 965,365 15.64
Baltimore 853,387 13.82
Anne Arundel 589,106 9.54
Baltimore city 583,157 9.45
Howard 332,814 5.39
Frederick 272,786 4.42
Harford 261,230 4.23
Carroll 172,941 2.80
Charles 166,741 2.70
Washington 154,697 2.51
St. Mary's 113,999 1.85
Cecil 103,800 1.68
Wicomico 103,565 1.68
Calvert 92,915 1.51
Allegany 67,960 1.10
Worcester 52,522 0.85
Queen Anne's 50,033 0.81
Talbot 37,488 0.61
Caroline 33,270 0.54
Dorchester 32,530 0.53
Garrett 28,798 0.47
Somerset 24,561 0.40
Kent 19,120 0.31
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