Data / Rankings / Uninsured rate, under 65 (US model-based estimate) / Counties in Massachusetts

Counties in Massachusetts by uninsured rate, under 65 (US model-based estimate)

Dukes County had the highest uninsured rate, under 65 (US model-based estimate) of 14 counties in 2023, at 4.8%. Norfolk County had the lowest, at 2.1%. The median was 3.1% and the figure for Massachusetts was 3%. Source: the U.S. Census Bureau.

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Highest4.8Dukes County
Lowest2.1Norfolk County
Median3.114 counties
Massachusetts3History

Map of counties, 2023

Barnstable County: 3.1 %Berkshire County: 2.8 %Bristol County: 3.9 %Dukes County: 4.8 %Essex County: 3.6 %Franklin County: 3 %Hampden County: 3.8 %Hampshire County: 2.4 %Middlesex County: 2.4 %Nantucket County: 3 %Norfolk County: 2.1 %Plymouth County: 2.7 %Suffolk County: 3.6 %Worcester County: 3.2 %
  • Under 2.6
  • 2.6 to 3
  • 3 to 3.2
  • 3.2 to 3.7
  • 3.7 and over
%, 2023. Source: U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2023

Dukes County: 4.8 %Dukes County4.8Bristol County: 3.9 %Bristol County3.9Hampden County: 3.8 %Hampden County3.8Essex County: 3.6 %Essex County3.6Suffolk County: 3.6 %Suffolk County3.6Worcester County: 3.2 %Worcester County3.2Barnstable County: 3.1 %Barnstable County3.1Franklin County: 3 %Franklin County3Nantucket County: 3 %Nantucket County3Berkshire County: 2.8 %Berkshire County2.8Plymouth County: 2.7 %Plymouth County2.7Hampshire County: 2.4 %Hampshire County2.4Middlesex County: 2.4 %Middlesex County2.4Norfolk County: 2.1 %Norfolk County2.1Dukes County: 4.8 %Dukes County4.8Bristol County: 3.9 %Bristol County3.9Hampden County: 3.8 %Hampden County3.8Essex County: 3.6 %Essex County3.6Suffolk County: 3.6 %Suffolk County3.6Worcester County: 3.2 %Worcester County3.2Barnstable County: 3.1 %Barnstable County3.1Franklin County: 3 %Franklin County3Nantucket County: 3 %Nantucket County3Berkshire County: 2.8 %Berkshire County2.8Plymouth County: 2.7 %Plymouth County2.7Hampshire County: 2.4 %Hampshire County2.4Middlesex County: 2.4 %Middlesex County2.4Norfolk County: 2.1 %Norfolk County2.1
%. Source: U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties. Retrieved 2026-10-12.

Full ranking

RankCounties2023 (%)Change on 2022
1Dukes County4.8+0.7 pts
2Bristol County3.9+0.5 pts
3Hampden County3.8+0.5 pts
4Essex County3.6+0.1 pts
4Suffolk County3.6+0.5 pts
6Worcester County3.20 pts
7Barnstable County3.1+0.1 pts
8Franklin County3+0.4 pts
8Nantucket County3-0.8 pts
10Berkshire County2.80 pts
11Plymouth County2.7+0.3 pts
12Hampshire County2.4-0.1 pts
12Middlesex County2.40 pts
14Norfolk County2.1-0.3 pts

Other periods

About this ranking

People under 65 without health insurance coverage of any kind, as a percentage of all people under 65. United States: Census Bureau Small Area Health Insurance Estimates (SAHIE) for states and counties, all races, both sexes and all income levels.

A model-based single-year estimate that combines the American Community Survey with administrative records and population estimates, so every county gets a figure. Covers states and counties only, because the SAHIE dataset files have no national row. The Census Bureau advises comparing years from 2008 on only; 2013 is the updated release. People 65 and over are left out because nearly all of them have Medicare.

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. Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2023-csv.zip. 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). Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties (Counties in Massachusetts by uninsured rate, under 65 (US model-based estimate), 2023) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2023-csv.zip

MLA 9

Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties, Counties in Massachusetts by uninsured rate, under 65 (US model-based estimate), 2023. U.S. Census Bureau, 6 Aug. 2026, https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2023-csv.zip. Invokely, https://invokely.ai/rankings/uninsured-rate-under-65/massachusetts-counties?period=2023. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties. Counties in Massachusetts by uninsured rate, under 65 (US model-based estimate), 2023. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2023-csv.zip. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-under-65/massachusetts-counties?period=2023.

Harvard

U.S. Census Bureau (2026) Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties, Counties in Massachusetts by uninsured rate, under 65 (US model-based estimate), 2023 [Dataset]. Available at: https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2023-csv.zip, via Invokely: https://invokely.ai/rankings/uninsured-rate-under-65/massachusetts-counties?period=2023 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_massachusetts_by_2023,
  author = {{U.S. Census Bureau}},
  title = {{Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties: Counties in Massachusetts by uninsured rate, under 65 (US model-based estimate), 2023}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2023-csv.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-under-65/massachusetts-counties?period=2023. Publisher attribution: U.S. Census Bureau. Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2023-csv.zip. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties: Counties in Massachusetts by uninsured rate, under 65 (US model-based estimate), 2023
PY  - 2026
DA  - 2026/08/06
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2023-csv.zip
L2  - https://invokely.ai/rankings/uninsured-rate-under-65/massachusetts-counties?period=2023
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-under-65/massachusetts-counties?period=2023.
N1  - Publisher attribution: U.S. Census Bureau. Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2023-csv.zip. Retrieved 2026-10-12.
ER  -
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rank_places {"indicator":"uninsured_rate_under_65","level":"province","within":"Massachusetts","limit":10}
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Questions

Which county has the highest uninsured rate, under 65 (US model-based estimate)?

Dukes County, with 4.8% in 2023, according to the U.S. Census Bureau.

Which county has the lowest uninsured rate, under 65 (US model-based estimate)?

Norfolk County, with 2.1% in 2023.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties. Retrieved 2026-10-12.

Uninsured rate, under 65 (US model-based estimate): other rankings

Counties in Massachusetts: more rankings