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

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

Washington County had the highest uninsured rate, ages 18 to 64 (US model-based estimate) of 16 counties in 2023, at 12.9%. Cumberland County had the lowest, at 7%. The median was 9.6% and the figure for Maine was 8.8%. Source: the U.S. Census Bureau.

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Highest12.9Washington County
Lowest7Cumberland County
Median9.616 counties
Maine8.8History

Map of counties, 2023

Androscoggin County: 8.9 %Aroostook County: 10.1 %Cumberland County: 7 %Franklin County: 10.4 %Hancock County: 11.6 %Kennebec County: 8.5 %Knox County: 11.3 %Lincoln County: 9.6 %Oxford County: 11.2 %Penobscot County: 9.2 %Piscataquis County: 9.7 %Sagadahoc County: 7.5 %Somerset County: 10.6 %Waldo County: 9.6 %Washington County: 12.9 %York County: 7.5 %
  • Under 8.5
  • 8.5 to 9.6
  • 9.6 to 10
  • 10 to 11
  • 11 and over
%, 2023. 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, 2023

Washington County: 12.9 %Washington County12.9Hancock County: 11.6 %Hancock County11.6Knox County: 11.3 %Knox County11.3Oxford County: 11.2 %Oxford County11.2Somerset County: 10.6 %Somerset County10.6Franklin County: 10.4 %Franklin County10.4Aroostook County: 10.1 %Aroostook County10.1Piscataquis County: 9.7 %Piscataquis County9.7Lincoln County: 9.6 %Lincoln County9.6Waldo County: 9.6 %Waldo County9.6Penobscot County: 9.2 %Penobscot County9.2Androscoggin County: 8.9 %Androscoggin County8.9Kennebec County: 8.5 %Kennebec County8.5Sagadahoc County: 7.5 %Sagadahoc County7.5York County: 7.5 %York County7.5Cumberland County: 7 %Cumberland County7Washington County: 12.9 %Washington County12.9Hancock County: 11.6 %Hancock County11.6Knox County: 11.3 %Knox County11.3Oxford County: 11.2 %Oxford County11.2Somerset County: 10.6 %Somerset County10.6Franklin County: 10.4 %Franklin County10.4Aroostook County: 10.1 %Aroostook County10.1Piscataquis County: 9.7 %Piscataquis County9.7Lincoln County: 9.6 %Lincoln County9.6Waldo County: 9.6 %Waldo County9.6Penobscot County: 9.2 %Penobscot County9.2Androscoggin County: 8.9 %Androscoggin County8.9Kennebec County: 8.5 %Kennebec County8.5Sagadahoc County: 7.5 %Sagadahoc County7.5York County: 7.5 %York County7.5Cumberland County: 7 %Cumberland County7
%. 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

RankCounties2023 (%)Change on 2022
1Washington County12.9-0.8 pts
2Hancock County11.6-1.3 pts
3Knox County11.3-0.3 pts
4Oxford County11.2-1.6 pts
5Somerset County10.6-0.8 pts
6Franklin County10.4+0.2 pts
7Aroostook County10.1-1.6 pts
8Piscataquis County9.7-0.8 pts
9Lincoln County9.6-1.7 pts
9Waldo County9.6-2.3 pts
11Penobscot County9.2-0.9 pts
12Androscoggin County8.9-0.8 pts
13Kennebec County8.5-0.9 pts
14Sagadahoc County7.5-1.3 pts
14York County7.5-0.5 pts
16Cumberland County7-0.8 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-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, ages 18 to 64, all races, both sexes, all income levels, states and counties (Counties in Maine by uninsured rate, ages 18 to 64 (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, ages 18 to 64, all races, both sexes, all income levels, states and counties, Counties in Maine by uninsured rate, ages 18 to 64 (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-ages-18-64/maine-counties?period=2023. 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 Maine by uninsured rate, ages 18 to 64 (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-ages-18-64/maine-counties?period=2023.

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 Maine by uninsured rate, ages 18 to 64 (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-ages-18-64/maine-counties?period=2023 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_maine_by_2023,
  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 Maine by uninsured rate, ages 18 to 64 (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-ages-18-64/maine-counties?period=2023. 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-2023-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 Maine by uninsured rate, ages 18 to 64 (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-ages-18-64/maine-counties?period=2023
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/maine-counties?period=2023.
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-2023-csv.zip. Retrieved 2026-10-12.
ER  -
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Questions

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

Washington County, with 12.9% in 2023, according to the U.S. Census Bureau.

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

Cumberland County, with 7% 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, 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 Maine: more rankings