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 2020, at 15.1%. Cumberland County had the lowest, at 8.5%. The median was 11.4% and the figure for Maine was 10.4%. Source: the U.S. Census Bureau.

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Highest15.1Washington County
Lowest8.5Cumberland County
Median11.416 counties
Maine10.4History

Map of counties, 2020

Androscoggin County: 10.3 %Aroostook County: 13 %Cumberland County: 8.5 %Franklin County: 11.4 %Hancock County: 12.4 %Kennebec County: 10 %Knox County: 11.4 %Lincoln County: 13.2 %Oxford County: 11.1 %Penobscot County: 11 %Piscataquis County: 12.4 %Sagadahoc County: 9.6 %Somerset County: 12.5 %Waldo County: 13.2 %Washington County: 15.1 %York County: 9.3 %
  • Under 10
  • 10 to 11
  • 11 to 12
  • 12 to 13
  • 13 and over
%, 2020. 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, 2020

Washington County: 15.1 %Washington County15.1Lincoln County: 13.2 %Lincoln County13.2Waldo County: 13.2 %Waldo County13.2Aroostook County: 13 %Aroostook County13Somerset County: 12.5 %Somerset County12.5Hancock County: 12.4 %Hancock County12.4Piscataquis County: 12.4 %Piscataquis County12.4Franklin County: 11.4 %Franklin County11.4Knox County: 11.4 %Knox County11.4Oxford County: 11.1 %Oxford County11.1Penobscot County: 11 %Penobscot County11Androscoggin County: 10.3 %Androscoggin County10.3Kennebec County: 10 %Kennebec County10Sagadahoc County: 9.6 %Sagadahoc County9.6York County: 9.3 %York County9.3Cumberland County: 8.5 %Cumberland County8.5Washington County: 15.1 %Washington County15.1Lincoln County: 13.2 %Lincoln County13.2Waldo County: 13.2 %Waldo County13.2Aroostook County: 13 %Aroostook County13Somerset County: 12.5 %Somerset County12.5Hancock County: 12.4 %Hancock County12.4Piscataquis County: 12.4 %Piscataquis County12.4Franklin County: 11.4 %Franklin County11.4Knox County: 11.4 %Knox County11.4Oxford County: 11.1 %Oxford County11.1Penobscot County: 11 %Penobscot County11Androscoggin County: 10.3 %Androscoggin County10.3Kennebec County: 10 %Kennebec County10Sagadahoc County: 9.6 %Sagadahoc County9.6York County: 9.3 %York County9.3Cumberland County: 8.5 %Cumberland County8.5
%. 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

RankCounties2020 (%)Change on 2019
1Washington County15.1-3.6 pts
2Lincoln County13.2-1.8 pts
2Waldo County13.2+0.3 pts
4Aroostook County13-1.8 pts
5Somerset County12.5-1.6 pts
6Hancock County12.4-0.3 pts
6Piscataquis County12.4-1.8 pts
8Franklin County11.4-2.6 pts
8Knox County11.4-1.6 pts
10Oxford County11.1-2 pts
11Penobscot County11-2.4 pts
12Androscoggin County10.3-1.1 pts
13Kennebec County10-2 pts
14Sagadahoc County9.6-0.5 pts
15York County9.3-0.6 pts
16Cumberland County8.5-0.4 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-2020-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), 2020) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2020-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), 2020. U.S. Census Bureau, 6 Aug. 2026, https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2020-csv.zip. Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/maine-counties?period=2020. 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), 2020. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2020-csv.zip. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/maine-counties?period=2020.

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), 2020 [Dataset]. Available at: https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2020-csv.zip, via Invokely: https://invokely.ai/rankings/uninsured-rate-ages-18-64/maine-counties?period=2020 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_maine_by_2020,
  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), 2020}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2020-csv.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/maine-counties?period=2020. 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-2020-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), 2020
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-2020-csv.zip
L2  - https://invokely.ai/rankings/uninsured-rate-ages-18-64/maine-counties?period=2020
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/maine-counties?period=2020.
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-2020-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 15.1% in 2020, 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 8.5% in 2020.

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