Maryland Population By County in 2010

Updated on January 29, 2024.

Based on the US Census Vintage data estimates, in 2010, the population of Maryland was 5,788,784. Among all Maryland counties, Montgomery had the highest population (975,619), followed by Prince George's (866,442), and Baltimore (806,654). Kent was the least populated county (20,213).

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 2010
Maryland Population By County in 2010
County
Population
% of State Population
Montgomery 975,619 16.85
Prince George's 866,442 14.97
Baltimore 806,654 13.94
Baltimore city 620,942 10.73
Anne Arundel 539,305 9.32
Howard 288,618 4.99
Harford 245,236 4.24
Frederick 234,239 4.05
Carroll 167,230 2.89
Washington 147,727 2.55
Charles 147,159 2.54
St. Mary's 105,772 1.83
Cecil 101,161 1.75
Wicomico 98,974 1.71
Calvert 88,989 1.54
Allegany 74,968 1.30
Worcester 51,500 0.89
Queen Anne's 47,809 0.83
Talbot 37,876 0.65
Caroline 33,054 0.57
Dorchester 32,689 0.56
Garrett 30,144 0.52
Somerset 26,464 0.46
Kent 20,213 0.35
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