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

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

Prince George's County had the highest uninsured rate, all ages (US) of 24 counties in 2022, at 10.5%. Carroll County had the lowest, at 2.9%. The median was 4.5% and the figure for Maryland was 5.9%. Source: the U.S. Census Bureau.

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Highest10.5Prince George's County
Lowest2.9Carroll County
Median4.524 counties
Maryland5.9History

Map of counties, 2022

Allegany County: 4 %Anne Arundel County: 4.5 %Baltimore County: 5.3 %Calvert County: 3.2 %Caroline County: 6.8 %Carroll County: 2.9 %Cecil County: 3.9 %Charles County: 4 %Dorchester County: 5.3 %Frederick County: 4.5 %Garrett County: 5.8 %Harford County: 3.5 %Howard County: 3.9 %Kent County: 4.3 %Montgomery County: 6.7 %Prince George's County: 10.5 %Queen Anne's County: 5.1 %St. Mary's County: 4 %Somerset County: 3.9 %Talbot County: 4.4 %Washington County: 5.5 %Wicomico County: 6.5 %Worcester County: 5.8 %Baltimore city: 5.5 %
  • Under 3.9
  • 3.9 to 4.3
  • 4.3 to 5.2
  • 5.2 to 5.8
  • 5.8 and over
%, 2022. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2022

Prince George's County: 10.5 %Prince George's County10.5Caroline County: 6.8 %Caroline County6.8Montgomery County: 6.7 %Montgomery County6.7Wicomico County: 6.5 %Wicomico County6.5Garrett County: 5.8 %Garrett County5.8Worcester County: 5.8 %Worcester County5.8Baltimore city: 5.5 %Baltimore city5.5Washington County: 5.5 %Washington County5.5Baltimore County: 5.3 %Baltimore County5.3Dorchester County: 5.3 %Dorchester County5.3Queen Anne's County: 5.1 %Queen Anne's County5.1Anne Arundel County: 4.5 %Anne Arundel County4.5Frederick County: 4.5 %Frederick County4.5Talbot County: 4.4 %Talbot County4.4Kent County: 4.3 %Kent County4.3Charles County: 4 %Charles County4Allegany County: 4 %Allegany County4St. Mary's County: 4 %St. Mary's County4Somerset County: 3.9 %Somerset County3.9Cecil County: 3.9 %Cecil County3.9Howard County: 3.9 %Howard County3.9Harford County: 3.5 %Harford County3.5Calvert County: 3.2 %Calvert County3.2Carroll County: 2.9 %Carroll County2.9Prince George's County: 10.5 %Prince George's County10.5Caroline County: 6.8 %Caroline County6.8Montgomery County: 6.7 %Montgomery County6.7Wicomico County: 6.5 %Wicomico County6.5Garrett County: 5.8 %Garrett County5.8Worcester County: 5.8 %Worcester County5.8Baltimore city: 5.5 %Baltimore city5.5Washington County: 5.5 %Washington County5.5Baltimore County: 5.3 %Baltimore County5.3Dorchester County: 5.3 %Dorchester County5.3Queen Anne's County: 5.1 %Queen Anne's County5.1Anne Arundel County: 4.5 %Anne Arundel County4.5Frederick County: 4.5 %Frederick County4.5Talbot County: 4.4 %Talbot County4.4Kent County: 4.3 %Kent County4.3Charles County: 4 %Charles County4Allegany County: 4 %Allegany County4St. Mary's County: 4 %St. Mary's County4Somerset County: 3.9 %Somerset County3.9Cecil County: 3.9 %Cecil County3.9Howard County: 3.9 %Howard County3.9Harford County: 3.5 %Harford County3.5Calvert County: 3.2 %Calvert County3.2Carroll County: 2.9 %Carroll County2.9
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2022 (%)Change on 2021
1Prince George's County10.5+0.1 pts
2Caroline County6.8+0.1 pts
3Montgomery County6.70 pts
4Wicomico County6.5-0.3 pts
5Garrett County5.8+0.4 pts
6Worcester County5.8-0.6 pts
7Baltimore city5.5-0.4 pts
8Washington County5.5+0.5 pts
9Baltimore County5.3+0.1 pts
10Dorchester County5.3-0.1 pts
11Queen Anne's County5.1+0.5 pts
12Anne Arundel County4.50 pts
12Frederick County4.5-0 pts
14Talbot County4.4+0.1 pts
15Kent County4.3+0.3 pts
16Charles County4-0.4 pts
17Allegany County4-0.2 pts
18St. Mary's County4-0.3 pts
19Somerset County3.9-1.1 pts
20Cecil County3.9-0.2 pts
21Howard County3.90 pts
22Harford County3.50 pts
23Calvert County3.2+0.2 pts
24Carroll County2.9-0.2 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/2022/table-based-SF/data/5YRData/acsdt5y2022-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), 2022) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/acs/summary_file/2022/table-based-SF/data/5YRData/acsdt5y2022-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), 2022. U.S. Census Bureau, 29 Jan. 2026, https://www2.census.gov/programs-surveys/acs/summary_file/2022/table-based-SF/data/5YRData/acsdt5y2022-b27010.dat. Invokely, https://invokely.ai/rankings/uninsured-rate/maryland-counties?period=2022. 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), 2022. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/acs/summary_file/2022/table-based-SF/data/5YRData/acsdt5y2022-b27010.dat. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate/maryland-counties?period=2022.

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), 2022 [Dataset]. Available at: https://www2.census.gov/programs-surveys/acs/summary_file/2022/table-based-SF/data/5YRData/acsdt5y2022-b27010.dat, via Invokely: https://invokely.ai/rankings/uninsured-rate/maryland-counties?period=2022 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_maryland_by_2022,
  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), 2022}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/acs/summary_file/2022/table-based-SF/data/5YRData/acsdt5y2022-b27010.dat},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate/maryland-counties?period=2022. 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/2022/table-based-SF/data/5YRData/acsdt5y2022-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), 2022
PY  - 2026
DA  - 2026/01/29
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/acs/summary_file/2022/table-based-SF/data/5YRData/acsdt5y2022-b27010.dat
L2  - https://invokely.ai/rankings/uninsured-rate/maryland-counties?period=2022
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate/maryland-counties?period=2022.
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/2022/table-based-SF/data/5YRData/acsdt5y2022-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 10.5% in 2022, according to the U.S. Census Bureau.

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

Carroll County, with 2.9% in 2022.

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