Maryland Citizen Population By County in 2011 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2011, the citizen population for Maryland was 5,310,845 and represented 92.58% of the total Maryland population.

Among all Maryland counties, Montgomery had the highest citizen population (799.66K), followed by Baltimore (756.94K), and Prince George's (750.64K).

In terms of percentages, Garrett had the highest percentage of its population being citizens (99.59%), followed by Allegany (99.01%), and Calvert (98.69%).

The chart and table below shows the citizen population of each county and the percentage of each county's population that were citizens.

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

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Maryland Citizen Population By County in 2011
Maryland Citizen Population By County in 2011
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County Citizen Population % of County Population
Montgomery 799660 83.32
Baltimore 756935 94.32
Prince George's 750640 87.43
Baltimore city 593335 95.67
Anne Arundel 511545 96.09
Howard 260885 91.97
Harford 239225 98.06
Frederick 219645 94.79
Carroll 164860 98.56
Washington 143850 97.78
Charles 142060 97.63
St. Mary's 102010 98.27
Cecil 99290 98.59
Wicomico 93600 95.65
Calvert 87175 98.69
Allegany 74050 99.01
Worcester 50040 97.53
Queen Anne's 46590 98.15
Talbot 36370 96.79
Dorchester 31900 98.21
Caroline 31880 96.74
Garrett 30005 99.59
Somerset 25695 97.13
Kent 19595 97.49