Ranking of Maryland Counties By Number of People and Percentage of Population With No Health Insurance Coverage in 2021 (ACS-5Yrs)

Updated on October 27, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, the percentage of the Maryland population without a health insurance coverage was 5.95% (i.e. 360,098 people). Percentagewise, among all Maryland counties, Prince George's County had the highest percentage of its population with no health insurance coverage (10.33%), followed by Wicomico County (6.71%), and Caroline County (6.66%).

In numerical terms, Prince George's County had the highest number of people without a health insurance coverage (98,154), followed by Montgomery County (69,852), and Baltimore County (43,932).

The charts below shows the top 10 counties by the number of people and percentage of the population without a health insurance coverage. The tables below shows the ranking for all Maryland counties.

You can see similar information for other types of health insurance coverages.

You can also see similar information for other states.

Ranking of Maryland Counties By Percentage of Population With No Health Insurance Coverage in 2021
Prince George's County
Wicomico County
Caroline County
Montgomery County
Worcester County
Baltimore city
Garrett County
Dorchester County
Baltimore County
Somerset County
Ranking of Maryland Counties By Number of People With No Health Insurance Coverage in 2021
Prince George's County
Montgomery County
Baltimore County
Baltimore city
Anne Arundel County
Howard County
Frederick County
Harford County
Charles County
Washington County
Ranking of Maryland Counties By Percentage of Population With No Health Insurance Coverage in 2021
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Rank County Percentage of Population (%)
1 Prince George's County 10.33
2 Wicomico County 6.71
3 Caroline County 6.66
3 Montgomery County 6.66
4 Worcester County 6.32
5 Baltimore city 5.90
6 Garrett County 5.45
7 Dorchester County 5.35
8 Baltimore County 5.21
9 Somerset County 5.01
10 Washington County 4.91
11 Frederick County 4.56
12 Queen Anne's County 4.50
13 Anne Arundel County 4.49
14 Charles County 4.46
15 Talbot County 4.31
16 St. Mary's County 4.27
17 Allegany County 4.21
18 Cecil County 4.08
19 Kent County 3.97
20 Howard County 3.88
21 Harford County 3.45
22 Carroll County 3.11
23 Calvert County 2.93
Ranking of Maryland Counties By Number of People With NO Health Insurance Coverage in 2021
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Rank County Number of People
1 Prince George's County 98154
2 Montgomery County 69852
3 Baltimore County 43932
4 Baltimore city 34450
5 Anne Arundel County 25160
6 Howard County 12612
7 Frederick County 12080
8 Harford County 8868
9 Charles County 7227
10 Washington County 7134
11 Wicomico County 6836
12 Carroll County 5282
13 St. Mary's County 4691
14 Cecil County 4182
15 Worcester County 3256
16 Calvert County 2666
17 Allegany County 2651
18 Queen Anne's County 2214
19 Caroline County 2189
20 Dorchester County 1716
21 Talbot County 1599
22 Garrett County 1553
23 Somerset County 1043
24 Kent County 751