Maryland Population By County in 2023

Updated on June 16, 2025.

Based on the US Census Vintage data estimates, in 2023, the population of Maryland was 6,217,062. Among all Maryland counties, Montgomery had the highest population (1,069,397), followed by Prince George's (956,533), and Baltimore (848,676).

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.

Related Topics: Maryland Census Vintage Data Topic List.

Data Source: US Census Bureau (Vintage).

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Maryland Population By County in 2023

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County	Population	% of State Population
Allegany	67296	1.08
Anne Arundel	599965	9.65
Baltimore	848676	13.65
Calvert	94828	1.53
Caroline	33838	0.54
Carroll	176735	2.84
Cecil	105676	1.70
Charles	172268	2.77
Dorchester	32922	0.53
Frederick	294154	4.73
Garrett	28502	0.46
Harford	264771	4.26
Howard	337341	5.43
Kent	19441	0.31
Montgomery	1069397	17.20
Prince George's	956533	15.39
Queen Anne's	52682	0.85
St. Mary's	115479	1.86
Somerset	25044	0.40
Talbot	38067	0.61
Washington	156116	2.51
Wicomico	105585	1.70
Worcester	54229	0.87
Baltimore city	567517	9.13