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

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

Nantucket County had the highest uninsured rate, ages 35 to 64 (US, ACS) of 14 counties in 2024, at 8%. Hampshire County had the lowest, at 1.5%. The median was 2.9% and the figure for Massachusetts was 2.9%. Source: the U.S. Census Bureau.

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Highest8Nantucket County
Lowest1.5Hampshire County
Median2.914 counties
Massachusetts2.9History

Map of counties, 2024

Barnstable County: 3.7 %Berkshire County: 2.4 %Bristol County: 3.9 %Dukes County: 1.8 %Essex County: 3.2 %Franklin County: 2.7 %Hampden County: 3.3 %Hampshire County: 1.5 %Middlesex County: 2.6 %Nantucket County: 8 %Norfolk County: 1.8 %Plymouth County: 3.1 %Suffolk County: 3.7 %Worcester County: 2.7 %
  • Under 2.2
  • 2.2 to 2.7
  • 2.7 to 3.2
  • 3.2 to 3.7
  • 3.7 and over
%, 2024. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2024

Nantucket County: 8 %Nantucket County8Bristol County: 3.9 %Bristol County3.9Barnstable County: 3.7 %Barnstable County3.7Suffolk County: 3.7 %Suffolk County3.7Hampden County: 3.3 %Hampden County3.3Essex County: 3.2 %Essex County3.2Plymouth County: 3.1 %Plymouth County3.1Franklin County: 2.7 %Franklin County2.7Worcester County: 2.7 %Worcester County2.7Middlesex County: 2.6 %Middlesex County2.6Berkshire County: 2.4 %Berkshire County2.4Dukes County: 1.8 %Dukes County1.8Norfolk County: 1.8 %Norfolk County1.8Hampshire County: 1.5 %Hampshire County1.5Nantucket County: 8 %Nantucket County8Bristol County: 3.9 %Bristol County3.9Barnstable County: 3.7 %Barnstable County3.7Suffolk County: 3.7 %Suffolk County3.7Hampden County: 3.3 %Hampden County3.3Essex County: 3.2 %Essex County3.2Plymouth County: 3.1 %Plymouth County3.1Franklin County: 2.7 %Franklin County2.7Worcester County: 2.7 %Worcester County2.7Middlesex County: 2.6 %Middlesex County2.6Berkshire County: 2.4 %Berkshire County2.4Dukes County: 1.8 %Dukes County1.8Norfolk County: 1.8 %Norfolk County1.8Hampshire County: 1.5 %Hampshire County1.5
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2024 (%)Change on 2023
1Nantucket County8+1.6 pts
2Bristol County3.9+0.4 pts
3Barnstable County3.7-0.7 pts
4Suffolk County3.7-0.1 pts
5Hampden County3.3+0.1 pts
6Essex County3.2+0.1 pts
7Plymouth County3.1-0 pts
8Franklin County2.7-0.3 pts
8Worcester County2.7-0.2 pts
10Middlesex County2.6-0.2 pts
11Berkshire County2.4-0.7 pts
12Dukes County1.8-3.5 pts
12Norfolk County1.8-0.2 pts
14Hampshire County1.5-0.1 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 Massachusetts 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 Massachusetts 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/massachusetts-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 Massachusetts 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/massachusetts-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 Massachusetts 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/massachusetts-counties (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_massachusetts_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 Massachusetts 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/massachusetts-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 Massachusetts 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/massachusetts-counties
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-35-64/massachusetts-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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Rank Counties in Massachusetts by uninsured rate, ages 35 to 64 (US, ACS) using official data, and cite the source.
rank_places {"indicator":"uninsured_rate_35_64","level":"province","within":"Massachusetts","limit":10}
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Questions

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

Nantucket County, with 8% in 2024, according to the U.S. Census Bureau.

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

Hampshire County, with 1.5% 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 Massachusetts: more rankings