Data / Rankings / Uninsured rate, ages 35 to 64 (US, ACS) / Counties in Maryland

Counties in Maryland by uninsured rate, ages 35 to 64 (US, ACS), 2024

Prince George's County had the highest uninsured rate, ages 35 to 64 (US, ACS) of 24 counties in 2024, at 13.6%. Somerset County had the lowest, at 3.4%. The median was 6.1% and the figure for Maryland was 7.5%. Source: the U.S. Census Bureau.

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Highest13.6Prince George's County
Lowest3.4Somerset County
Median6.124 counties
Maryland7.5History

Map of counties, 2024

Allegany County: 4.7 %Anne Arundel County: 5.5 %Baltimore County: 6.4 %Calvert County: 3.5 %Caroline County: 8.6 %Carroll County: 3.8 %Cecil County: 4.3 %Charles County: 4.7 %Dorchester County: 7.3 %Frederick County: 6.1 %Garrett County: 8.1 %Harford County: 3.9 %Howard County: 4.9 %Kent County: 7.9 %Montgomery County: 8.5 %Prince George's County: 13.6 %Queen Anne's County: 6.1 %St. Mary's County: 4.4 %Somerset County: 3.4 %Talbot County: 5.9 %Washington County: 8 %Wicomico County: 7.9 %Worcester County: 6.5 %Baltimore city: 7.3 %
  • Under 4.4
  • 4.4 to 5.6
  • 5.6 to 6.5
  • 6.5 to 7.9
  • 7.9 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: 13.6 %Prince George's County13.6Caroline County: 8.6 %Caroline County8.6Montgomery County: 8.5 %Montgomery County8.5Garrett County: 8.1 %Garrett County8.1Washington County: 8 %Washington County8Kent County: 7.9 %Kent County7.9Wicomico County: 7.9 %Wicomico County7.9Baltimore city: 7.3 %Baltimore city7.3Dorchester County: 7.3 %Dorchester County7.3Worcester County: 6.5 %Worcester County6.5Baltimore County: 6.4 %Baltimore County6.4Frederick County: 6.1 %Frederick County6.1Queen Anne's County: 6.1 %Queen Anne's County6.1Talbot County: 5.9 %Talbot County5.9Anne Arundel County: 5.5 %Anne Arundel County5.5Howard County: 4.9 %Howard County4.9Charles County: 4.7 %Charles County4.7Allegany County: 4.7 %Allegany County4.7St. Mary's County: 4.4 %St. Mary's County4.4Cecil County: 4.3 %Cecil County4.3Harford County: 3.9 %Harford County3.9Carroll County: 3.8 %Carroll County3.8Calvert County: 3.5 %Calvert County3.5Somerset County: 3.4 %Somerset County3.4Prince George's County: 13.6 %Prince George's County13.6Caroline County: 8.6 %Caroline County8.6Montgomery County: 8.5 %Montgomery County8.5Garrett County: 8.1 %Garrett County8.1Washington County: 8 %Washington County8Kent County: 7.9 %Kent County7.9Wicomico County: 7.9 %Wicomico County7.9Baltimore city: 7.3 %Baltimore city7.3Dorchester County: 7.3 %Dorchester County7.3Worcester County: 6.5 %Worcester County6.5Baltimore County: 6.4 %Baltimore County6.4Frederick County: 6.1 %Frederick County6.1Queen Anne's County: 6.1 %Queen Anne's County6.1Talbot County: 5.9 %Talbot County5.9Anne Arundel County: 5.5 %Anne Arundel County5.5Howard County: 4.9 %Howard County4.9Charles County: 4.7 %Charles County4.7Allegany County: 4.7 %Allegany County4.7St. Mary's County: 4.4 %St. Mary's County4.4Cecil County: 4.3 %Cecil County4.3Harford County: 3.9 %Harford County3.9Carroll County: 3.8 %Carroll County3.8Calvert County: 3.5 %Calvert County3.5Somerset County: 3.4 %Somerset County3.4
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2024 (%)Change on 2023
1Prince George's County13.6+0.3 pts
2Caroline County8.6+0.4 pts
3Montgomery County8.5+0.1 pts
4Garrett County8.1+0.4 pts
5Washington County8+0.4 pts
6Kent County7.9+2 pts
7Wicomico County7.9-0.1 pts
8Baltimore city7.3-0.1 pts
8Dorchester County7.3-0.3 pts
10Worcester County6.5-0.8 pts
11Baltimore County6.4+0.1 pts
12Frederick County6.10 pts
13Queen Anne's County6.1-0 pts
14Talbot County5.9-0.5 pts
15Anne Arundel County5.5+0.1 pts
16Howard County4.9+0.4 pts
17Charles County4.7+0.4 pts
18Allegany County4.7-0.5 pts
19St. Mary's County4.4+0.1 pts
20Cecil County4.3-0 pts
21Harford County3.9-0.2 pts
22Carroll County3.8+0.1 pts
23Calvert County3.5-0.3 pts
24Somerset County3.4-0.6 pts

Other periods

About this ranking

People aged 35 to 64 without health insurance coverage of any kind, as a percentage of the civilian noninstitutionalized population aged 35 to 64. 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 aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, 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 aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs (Counties in Maryland by uninsured rate, ages 35 to 64 (US, ACS), 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 aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs, Counties in Maryland by uninsured rate, ages 35 to 64 (US, ACS), 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-ages-35-64/maryland-counties. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs. Counties in Maryland by uninsured rate, ages 35 to 64 (US, ACS), 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-ages-35-64/maryland-counties.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs, Counties in Maryland by uninsured rate, ages 35 to 64 (US, ACS), 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-ages-35-64/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 aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs: Counties in Maryland by uninsured rate, ages 35 to 64 (US, ACS), 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-ages-35-64/maryland-counties. Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, 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 aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs: Counties in Maryland by uninsured rate, ages 35 to 64 (US, ACS), 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-ages-35-64/maryland-counties
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-35-64/maryland-counties.
N1  - Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, 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, ages 35 to 64 (US, ACS)?

Prince George's County, with 13.6% in 2024, according to the U.S. Census Bureau.

Which county has the lowest uninsured rate, ages 35 to 64 (US, ACS)?

Somerset County, with 3.4% 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 aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs. Retrieved 2026-10-12.

Uninsured rate, ages 35 to 64 (US, ACS): other rankings

Counties in Maryland: more rankings