Maryland Citizen Population By County in 2012 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2012, the citizen population for Maryland was 5,352,685 and represented 92.52% of the total Maryland population.

Among all Maryland counties, Montgomery had the highest citizen population (812.30K), followed by Baltimore (761.20K), and Prince George's (757.33K).

In terms of percentages, Garrett had the highest percentage of its population being citizens (99.37%), followed by Allegany (98.99%), and Calvert (98.99%).

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 2012
Maryland Citizen Population By County in 2012
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County Citizen Population % of County Population
Montgomery 812300 83.33
Baltimore 761195 94.29
Prince George's 757330 87.51
Baltimore city 592065 95.40
Anne Arundel 516620 95.94
Howard 265675 92.03
Harford 240485 98.00
Frederick 221945 94.74
Carroll 164815 98.54
Washington 144580 97.77
Charles 143470 97.53
St. Mary's 103950 98.50
Cecil 99600 98.51
Wicomico 94125 95.13
Calvert 87875 98.99
Allegany 73890 98.99
Worcester 50015 97.31
Queen Anne's 47150 98.45
Talbot 36605 96.98
Caroline 31965 97.03
Dorchester 31840 97.76
Garrett 29890 99.37
Somerset 25695 97.33
Kent 19610 97.15