Maryland Citizen Population By County in 2016 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2016, the citizen population for Maryland was 5,517,145 and represented 92.57% of the total Maryland population.

Among all Maryland counties, Montgomery had the highest citizen population (866.94K), followed by Prince George's (784.13K), and Baltimore (778.07K).

In terms of percentages, Garrett had the highest percentage of its population being citizens (99.75%), followed by Calvert (99.06%), and Allegany (98.58%).

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 2016
Maryland Citizen Population By County in 2016
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County Citizen Population % of County Population
Montgomery 866940 84.47
Prince George's 784130 87.35
Baltimore 778070 94.24
Baltimore city 591100 95.19
Anne Arundel 537305 95.99
Howard 282525 91.60
Harford 245035 98.10
Frederick 231430 95.06
Carroll 165115 98.56
Charles 150115 97.25
Washington 146030 97.63
St. Mary's 108895 98.39
Cecil 100590 98.45
Wicomico 96220 94.78
Calvert 89675 99.06
Allegany 72025 98.58
Worcester 50305 97.79
Queen Anne's 47995 98.53
Talbot 36540 97.00
Dorchester 31650 97.54
Caroline 31565 96.66
Garrett 29600 99.75
Somerset 25140 97.07
Kent 19155 96.65