Maryland Population By County in 2018
Updated on December 2, 2021.

According to the US Census Bureau population estimates, there were 6,042,153 people living in Maryland in 2018. Montgomery County was the most populated county with 1,048,794 residents, followed by Prince George's County with 911,372 residents, and Baltimore County with 828,547 residents. Kent County with a population of 19,467 was the least populated county in Maryland in 2018.

Use the map below to interactively explore the population of each county in Maryland in 2018. The data can also be explored further by sorting and filtering with the table below.

Hover/Click on the counties to see the values.
Maryland Population By County (2018)
See also Population estimate for other years:
Table of Maryland Population By County in 2018
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County Population % of State Population
Allegany 70,977 1.18%
Anne Arundel 575,641 9.53%
Baltimore 828,547 13.71%
Calvert 92,131 1.53%
Caroline 33,341 0.55%
Carroll 168,421 2.79%
Cecil 102,816 1.70%
Charles 161,879 2.68%
Dorchester 31,894 0.53%
Frederick 255,698 4.23%
Garrett 29,202 0.48%
Harford 253,884 4.20%
Howard 322,895 5.34%
Kent 19,467 0.32%
Montgomery 1,048,794 17.36%
Prince George's 911,372 15.08%
Queen Anne's 50,279 0.83%
St. Mary's 112,948 1.87%
Somerset 25,637 0.42%
Talbot 37,052 0.61%
Washington 150,699 2.49%
Wicomico 103,398 1.71%
Worcester 51,940 0.86%
Baltimore city 603,241 9.98%