Data / Rankings / Uninsured rate, all ages (US) / Counties in Maryland

Counties in Maryland by uninsured rate, all ages (US), 2024

Prince George's County had the highest uninsured rate, all ages (US) of 24 counties in 2024, at 11.4%. Carroll County had the lowest, at 2.9%. The median was 4.9% and the figure for Maryland was 6.3%. Source: the U.S. Census Bureau.

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Highest11.4Prince George's County
Lowest2.9Carroll County
Median4.924 counties
Maryland6.3History

Map of counties, 2024

Allegany County: 3.8 %Anne Arundel County: 4.8 %Baltimore County: 5.4 %Calvert County: 3.1 %Caroline County: 7.3 %Carroll County: 2.9 %Cecil County: 3.6 %Charles County: 4.6 %Dorchester County: 5.5 %Frederick County: 4.7 %Garrett County: 6.2 %Harford County: 3.6 %Howard County: 4.2 %Kent County: 6.1 %Montgomery County: 7 %Prince George's County: 11.4 %Queen Anne's County: 5.7 %St. Mary's County: 3.9 %Somerset County: 3.6 %Talbot County: 3.9 %Washington County: 6.3 %Wicomico County: 6.7 %Worcester County: 5 %Baltimore city: 5.9 %
  • Under 3.7
  • 3.7 to 4.6
  • 4.6 to 5.5
  • 5.5 to 6.2
  • 6.2 and over
%, 2024. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2024

Prince George's County: 11.4 %Prince George's County11.4Caroline County: 7.3 %Caroline County7.3Montgomery County: 7 %Montgomery County7Wicomico County: 6.7 %Wicomico County6.7Washington County: 6.3 %Washington County6.3Garrett County: 6.2 %Garrett County6.2Kent County: 6.1 %Kent County6.1Baltimore city: 5.9 %Baltimore city5.9Queen Anne's County: 5.7 %Queen Anne's County5.7Dorchester County: 5.5 %Dorchester County5.5Baltimore County: 5.4 %Baltimore County5.4Worcester County: 5 %Worcester County5Anne Arundel County: 4.8 %Anne Arundel County4.8Frederick County: 4.7 %Frederick County4.7Charles County: 4.6 %Charles County4.6Howard County: 4.2 %Howard County4.2Talbot County: 3.9 %Talbot County3.9St. Mary's County: 3.9 %St. Mary's County3.9Allegany County: 3.8 %Allegany County3.8Somerset County: 3.6 %Somerset County3.6Cecil County: 3.6 %Cecil County3.6Harford County: 3.6 %Harford County3.6Calvert County: 3.1 %Calvert County3.1Carroll County: 2.9 %Carroll County2.9Prince George's County: 11.4 %Prince George's County11.4Caroline County: 7.3 %Caroline County7.3Montgomery County: 7 %Montgomery County7Wicomico County: 6.7 %Wicomico County6.7Washington County: 6.3 %Washington County6.3Garrett County: 6.2 %Garrett County6.2Kent County: 6.1 %Kent County6.1Baltimore city: 5.9 %Baltimore city5.9Queen Anne's County: 5.7 %Queen Anne's County5.7Dorchester County: 5.5 %Dorchester County5.5Baltimore County: 5.4 %Baltimore County5.4Worcester County: 5 %Worcester County5Anne Arundel County: 4.8 %Anne Arundel County4.8Frederick County: 4.7 %Frederick County4.7Charles County: 4.6 %Charles County4.6Howard County: 4.2 %Howard County4.2Talbot County: 3.9 %Talbot County3.9St. Mary's County: 3.9 %St. Mary's County3.9Allegany County: 3.8 %Allegany County3.8Somerset County: 3.6 %Somerset County3.6Cecil County: 3.6 %Cecil County3.6Harford County: 3.6 %Harford County3.6Calvert County: 3.1 %Calvert County3.1Carroll County: 2.9 %Carroll County2.9
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2024 (%)Change on 2023
1Prince George's County11.4+0.2 pts
2Caroline County7.3+0.2 pts
3Montgomery County7+0.1 pts
4Wicomico County6.7+0.2 pts
5Washington County6.3+0.2 pts
6Garrett County6.2+0.2 pts
7Kent County6.1+0.7 pts
8Baltimore city5.9+0.2 pts
9Queen Anne's County5.70 pts
10Dorchester County5.5+0.1 pts
11Baltimore County5.4-0 pts
12Worcester County5-0.4 pts
13Anne Arundel County4.8+0.1 pts
14Frederick County4.7+0.1 pts
15Charles County4.6+0.2 pts
16Howard County4.2+0.2 pts
17Talbot County3.9-0.6 pts
18St. Mary's County3.9+0.1 pts
19Allegany County3.8-0.3 pts
20Somerset County3.6+0.2 pts
21Cecil County3.6-0.2 pts
22Harford County3.6-0.2 pts
23Calvert County3.1-0.3 pts
24Carroll County2.9+0.1 pts

Other periods

About this ranking

People without health insurance coverage of any kind, as a percentage of the civilian noninstitutionalized population. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

Coverage is what people reported at the interview, so the five-year figure averages five years of answers. People whose only coverage is the Indian Health Service count as uninsured. Active-duty military and people living in institutions are outside the universe. For single-year model-based county figures under 65, see uninsured_rate_under_65, uninsured_rate_18_64 and uninsured_rate_under_19 (SAHIE), a different source.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b27010.dat. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Census Bureau. (2026). American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs (Counties in Maryland by uninsured rate, all ages (US), 2024) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b27010.dat

MLA 9

American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs, Counties in Maryland by uninsured rate, all ages (US), 2024. U.S. Census Bureau, 29 Jan. 2026, https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b27010.dat. Invokely, https://invokely.ai/rankings/uninsured-rate/maryland-counties. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs. Counties in Maryland by uninsured rate, all ages (US), 2024. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b27010.dat. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate/maryland-counties.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs, Counties in Maryland by uninsured rate, all ages (US), 2024 [Dataset]. Available at: https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b27010.dat, via Invokely: https://invokely.ai/rankings/uninsured-rate/maryland-counties (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_maryland_by_2024,
  author = {{U.S. Census Bureau}},
  title = {{American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs: Counties in Maryland by uninsured rate, all ages (US), 2024}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b27010.dat},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate/maryland-counties. Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary\_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b27010.dat. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs: Counties in Maryland by uninsured rate, all ages (US), 2024
PY  - 2026
DA  - 2026/01/29
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b27010.dat
L2  - https://invokely.ai/rankings/uninsured-rate/maryland-counties
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate/maryland-counties.
N1  - Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b27010.dat. Retrieved 2026-10-12.
ER  -
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Questions

Which county has the highest uninsured rate, all ages (US)?

Prince George's County, with 11.4% in 2024, according to the U.S. Census Bureau.

Which county has the lowest uninsured rate, all ages (US)?

Carroll County, with 2.9% in 2024.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs. Retrieved 2026-10-12.

Uninsured rate, all ages (US): other rankings

Counties in Maryland: more rankings