Maryland Population By County in 2021

Updated on August 1, 2024.

Based on the US Census Vintage data estimates, in 2021, the population of Maryland was 6,175,045. Among all Maryland counties, Montgomery had the highest population (1,056,193), followed by Prince George's (956,451), and Baltimore (850,691). Kent was the least populated county (19,244).

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.

See this for other years:
Maryland Population By County in 2021
Maryland Population By County in 2021
Items per page:
0 of 0
County Population % of State Population
Allegany 67687 1.10
Anne Arundel 592085 9.59
Baltimore 850691 13.78
Calvert 94233 1.53
Caroline 33429 0.54
Carroll 174313 2.82
Cecil 104056 1.69
Charles 168927 2.74
Dorchester 32594 0.53
Frederick 280647 4.55
Garrett 28758 0.47
Harford 263302 4.26
Howard 335328 5.43
Kent 19244 0.31
Montgomery 1056193 17.10
Prince George's 956451 15.49
Queen Anne's 50922 0.83
St. Mary's 114650 1.86
Somerset 24546 0.40
Talbot 37756 0.61
Washington 155143 2.51
Wicomico 104114 1.69
Worcester 53398 0.87
Baltimore city 576578 9.34