Maryland Voting-age Population By County in 2021 (ACS-5Yrs)

Updated on February 28, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, the voting-age population of Maryland was 4.78M which was 77.67% of the total Maryland population. Among all Maryland counties, Montgomery had the highest voting-age population (810.84K), followed by Prince George's (743.66K), and Baltimore (664.73K).

On the other hand, the counties with the least voting-age population were: Kent (16.27K), Somerset (20.58K), and Garrett (23.60K).

The chart and table below shows the voting-age population of each county and the percentage of each county's population that are of voting-age.

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

Related Topics: Maryland ACS-5Yrs Estimates, 2021 Topic List.

Data Source: US Census - ACS 5-Year Estimates, 2021 Census.

Maryland Voting-age Population By County in 2021

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County	Voting-age Population	% of County Population
Allegany	56844	82.76
Anne Arundel	452868	77.54
Baltimore	664734	78.14
Calvert	70902	76.64
Caroline	25316	76.18
Carroll	134381	78.06
Cecil	79928	77.32
Charles	125346	75.87
Dorchester	25614	78.85
Frederick	204925	76.61
Garrett	23599	81.50
Harford	200979	77.55
Howard	248776	75.56
Kent	16270	84.15
Montgomery	810843	76.70
Prince George's	743664	77.65
Queen Anne's	38994	78.46
St. Mary's	85729	75.73
Somerset	20578	82.86
Talbot	30597	81.57
Washington	120214	78.08
Wicomico	80381	77.87
Worcester	43259	82.68
Baltimore city	470655	79.47