Data / Rankings / Uninsured rate, ages 18 to 64 (US model-based estimate) / Counties in Massachusetts

Counties in Massachusetts by uninsured rate, ages 18 to 64 (US model-based estimate)

Dukes County had the highest uninsured rate, ages 18 to 64 (US model-based estimate) of 14 counties in 2022, at 4.7%. Middlesex County had the lowest, at 2.7%. The median was 3.4% and the figure for Massachusetts was 3.3%. Source: the U.S. Census Bureau.

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Highest4.7Dukes County
Lowest2.7Middlesex County
Median3.414 counties
Massachusetts3.3History

Map of counties, 2022

Barnstable County: 3.4 %Berkshire County: 3.1 %Bristol County: 3.9 %Dukes County: 4.7 %Essex County: 4 %Franklin County: 2.9 %Hampden County: 3.8 %Hampshire County: 2.8 %Middlesex County: 2.7 %Nantucket County: 4.3 %Norfolk County: 2.8 %Plymouth County: 2.8 %Suffolk County: 3.4 %Worcester County: 3.7 %
  • Under 2.8
  • 2.8 to 3.2
  • 3.2 to 3.6
  • 3.6 to 3.9
  • 3.9 and over
%, 2022. Source: U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2022

Dukes County: 4.7 %Dukes County4.7Nantucket County: 4.3 %Nantucket County4.3Essex County: 4 %Essex County4Bristol County: 3.9 %Bristol County3.9Hampden County: 3.8 %Hampden County3.8Worcester County: 3.7 %Worcester County3.7Barnstable County: 3.4 %Barnstable County3.4Suffolk County: 3.4 %Suffolk County3.4Berkshire County: 3.1 %Berkshire County3.1Franklin County: 2.9 %Franklin County2.9Hampshire County: 2.8 %Hampshire County2.8Norfolk County: 2.8 %Norfolk County2.8Plymouth County: 2.8 %Plymouth County2.8Middlesex County: 2.7 %Middlesex County2.7Dukes County: 4.7 %Dukes County4.7Nantucket County: 4.3 %Nantucket County4.3Essex County: 4 %Essex County4Bristol County: 3.9 %Bristol County3.9Hampden County: 3.8 %Hampden County3.8Worcester County: 3.7 %Worcester County3.7Barnstable County: 3.4 %Barnstable County3.4Suffolk County: 3.4 %Suffolk County3.4Berkshire County: 3.1 %Berkshire County3.1Franklin County: 2.9 %Franklin County2.9Hampshire County: 2.8 %Hampshire County2.8Norfolk County: 2.8 %Norfolk County2.8Plymouth County: 2.8 %Plymouth County2.8Middlesex County: 2.7 %Middlesex County2.7
%. Source: U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. Retrieved 2026-10-12.

Full ranking

RankCounties2022 (%)Change on 2021
1Dukes County4.70 pts
2Nantucket County4.3-0.5 pts
3Essex County4+0.2 pts
4Bristol County3.9-0.4 pts
5Hampden County3.8-0.7 pts
6Worcester County3.70 pts
7Barnstable County3.4-0.3 pts
7Suffolk County3.4-0.4 pts
9Berkshire County3.1-0.6 pts
10Franklin County2.9-0.4 pts
11Hampshire County2.8-0.1 pts
11Norfolk County2.8-0.1 pts
11Plymouth County2.8-0.5 pts
14Middlesex County2.7-0.2 pts

Other periods

About this ranking

People aged 18 to 64 without health insurance coverage of any kind, as a percentage of all people aged 18 to 64. 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. Working-age adults; the rate for everyone under 65 is uninsured_rate_under_65.

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, ages 18 to 64, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2022-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, ages 18 to 64, all races, both sexes, all income levels, states and counties (Counties in Massachusetts by uninsured rate, ages 18 to 64 (US model-based estimate), 2022) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2022-csv.zip

MLA 9

Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties, Counties in Massachusetts by uninsured rate, ages 18 to 64 (US model-based estimate), 2022. U.S. Census Bureau, 6 Aug. 2026, https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2022-csv.zip. Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/massachusetts-counties?period=2022. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. Counties in Massachusetts by uninsured rate, ages 18 to 64 (US model-based estimate), 2022. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2022-csv.zip. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/massachusetts-counties?period=2022.

Harvard

U.S. Census Bureau (2026) Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties, Counties in Massachusetts by uninsured rate, ages 18 to 64 (US model-based estimate), 2022 [Dataset]. Available at: https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2022-csv.zip, via Invokely: https://invokely.ai/rankings/uninsured-rate-ages-18-64/massachusetts-counties?period=2022 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_massachusetts_by_2022,
  author = {{U.S. Census Bureau}},
  title = {{Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties: Counties in Massachusetts by uninsured rate, ages 18 to 64 (US model-based estimate), 2022}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2022-csv.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/massachusetts-counties?period=2022. Publisher attribution: U.S. Census Bureau. Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2022-csv.zip. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties: Counties in Massachusetts by uninsured rate, ages 18 to 64 (US model-based estimate), 2022
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-2022-csv.zip
L2  - https://invokely.ai/rankings/uninsured-rate-ages-18-64/massachusetts-counties?period=2022
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/massachusetts-counties?period=2022.
N1  - Publisher attribution: U.S. Census Bureau. Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2022-csv.zip. Retrieved 2026-10-12.
ER  -
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rank_places {"indicator":"uninsured_rate_18_64","level":"province","within":"Massachusetts","limit":10}
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Questions

Which county has the highest uninsured rate, ages 18 to 64 (US model-based estimate)?

Dukes County, with 4.7% in 2022, according to the U.S. Census Bureau.

Which county has the lowest uninsured rate, ages 18 to 64 (US model-based estimate)?

Middlesex County, with 2.7% 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, Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. Retrieved 2026-10-12.

Uninsured rate, ages 18 to 64 (US model-based estimate): other rankings

Counties in Massachusetts: more rankings