Maryland Population By County in 2015

Updated on January 29, 2024.

Based on the US Census Vintage data estimates, in 2015, the population of Maryland was 5,988,528. Among all Maryland counties, Montgomery[object Promise] had the highest population (1,033,370), followed by Prince George's[object Promise] (906,754), and Baltimore[object Promise] (827,796). Kent[object Promise] was the least populated county (19,745).

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 2015
Maryland Population By County in 2015
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County Population % of State Population
Allegany 72501 1.21
Anne Arundel 563133 9.40
Baltimore 827796 13.82
Calvert 90542 1.51
Caroline 32601 0.54
Carroll 167201 2.79
Cecil 102453 1.71
Charles 155775 2.60
Dorchester 32431 0.54
Frederick 245145 4.09
Garrett 29451 0.49
Harford 249690 4.17
Howard 311417 5.20
Kent 19745 0.33
Montgomery 1033370 17.26
Prince George's 906754 15.14
Queen Anne's 49012 0.82
St. Mary's 111092 1.86
Somerset 25705 0.43
Talbot 37431 0.63
Washington 149160 2.49
Wicomico 101820 1.70
Worcester 51472 0.86
Baltimore city 622831 10.40