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), 2024

Washington County had the highest uninsured rate, ages 18 to 64 (US model-based estimate) of 16 counties in 2024, at 12.6%. York County had the lowest, at 6.2%. The median was 9.9% and the figure for Maine was 8.1%. Source: the U.S. Census Bureau.

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Highest12.6Washington County
Lowest6.2York County
Median9.916 counties
Maine8.1History

Map of counties, 2024

Androscoggin County: 8.3 %Aroostook County: 10.8 %Cumberland County: 6.5 %Franklin County: 10.2 %Hancock County: 10.4 %Kennebec County: 8.1 %Knox County: 9.7 %Lincoln County: 9.7 %Oxford County: 10.6 %Penobscot County: 8.2 %Piscataquis County: 11 %Sagadahoc County: 7.2 %Somerset County: 10.2 %Waldo County: 10.1 %Washington County: 12.6 %York County: 6.2 %
  • Under 8.1
  • 8.1 to 9.7
  • 9.7 to 10
  • 10 to 11
  • 11 and over
%, 2024. 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, 2024

Washington County: 12.6 %Washington County12.6Piscataquis County: 11 %Piscataquis County11Aroostook County: 10.8 %Aroostook County10.8Oxford County: 10.6 %Oxford County10.6Hancock County: 10.4 %Hancock County10.4Franklin County: 10.2 %Franklin County10.2Somerset County: 10.2 %Somerset County10.2Waldo County: 10.1 %Waldo County10.1Knox County: 9.7 %Knox County9.7Lincoln County: 9.7 %Lincoln County9.7Androscoggin County: 8.3 %Androscoggin County8.3Penobscot County: 8.2 %Penobscot County8.2Kennebec County: 8.1 %Kennebec County8.1Sagadahoc County: 7.2 %Sagadahoc County7.2Cumberland County: 6.5 %Cumberland County6.5York County: 6.2 %York County6.2Washington County: 12.6 %Washington County12.6Piscataquis County: 11 %Piscataquis County11Aroostook County: 10.8 %Aroostook County10.8Oxford County: 10.6 %Oxford County10.6Hancock County: 10.4 %Hancock County10.4Franklin County: 10.2 %Franklin County10.2Somerset County: 10.2 %Somerset County10.2Waldo County: 10.1 %Waldo County10.1Knox County: 9.7 %Knox County9.7Lincoln County: 9.7 %Lincoln County9.7Androscoggin County: 8.3 %Androscoggin County8.3Penobscot County: 8.2 %Penobscot County8.2Kennebec County: 8.1 %Kennebec County8.1Sagadahoc County: 7.2 %Sagadahoc County7.2Cumberland County: 6.5 %Cumberland County6.5York County: 6.2 %York County6.2
%. 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

RankCounties2024 (%)Change on 2023
1Washington County12.6-0.3 pts
2Piscataquis County11+1.3 pts
3Aroostook County10.8+0.7 pts
4Oxford County10.6-0.6 pts
5Hancock County10.4-1.2 pts
6Franklin County10.2-0.2 pts
6Somerset County10.2-0.4 pts
8Waldo County10.1+0.5 pts
9Knox County9.7-1.6 pts
9Lincoln County9.7+0.1 pts
11Androscoggin County8.3-0.6 pts
12Penobscot County8.2-1 pts
13Kennebec County8.1-0.4 pts
14Sagadahoc County7.2-0.3 pts
15Cumberland County6.5-0.5 pts
16York County6.2-1.3 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-2024-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), 2024) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-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), 2024. U.S. Census Bureau, 6 Aug. 2026, https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip. Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/maine-counties. 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), 2024. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/maine-counties.

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), 2024 [Dataset]. Available at: https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip, via Invokely: https://invokely.ai/rankings/uninsured-rate-ages-18-64/maine-counties (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_maine_by_2024,
  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), 2024}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/maine-counties. 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-2024-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), 2024
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-2024-csv.zip
L2  - https://invokely.ai/rankings/uninsured-rate-ages-18-64/maine-counties
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/maine-counties.
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-2024-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 12.6% in 2024, according to the U.S. Census Bureau.

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

York County, with 6.2% 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, 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