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 2015, at 18.1%. Sagadahoc County had the lowest, at 9%. The median was 13.1% and the figure for Maine was 11.9%. Source: the U.S. Census Bureau.

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Highest18.1Washington County
Lowest9Sagadahoc County
Median13.116 counties
Maine11.9History

Map of counties, 2015

Androscoggin County: 10.8 %Aroostook County: 14.1 %Cumberland County: 10.6 %Franklin County: 12.5 %Hancock County: 13.3 %Kennebec County: 10.2 %Knox County: 13.2 %Lincoln County: 14 %Oxford County: 12.9 %Penobscot County: 13.2 %Piscataquis County: 13.2 %Sagadahoc County: 9 %Somerset County: 12.9 %Waldo County: 13.9 %Washington County: 18.1 %York County: 11.3 %
  • Under 11
  • 11 to 13
  • 13 to 14
  • 14 and over
%, 2015. 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, 2015

Washington County: 18.1 %Washington County18.1Aroostook County: 14.1 %Aroostook County14.1Lincoln County: 14 %Lincoln County14Waldo County: 13.9 %Waldo County13.9Hancock County: 13.3 %Hancock County13.3Knox County: 13.2 %Knox County13.2Penobscot County: 13.2 %Penobscot County13.2Piscataquis County: 13.2 %Piscataquis County13.2Oxford County: 12.9 %Oxford County12.9Somerset County: 12.9 %Somerset County12.9Franklin County: 12.5 %Franklin County12.5York County: 11.3 %York County11.3Androscoggin County: 10.8 %Androscoggin County10.8Cumberland County: 10.6 %Cumberland County10.6Kennebec County: 10.2 %Kennebec County10.2Sagadahoc County: 9 %Sagadahoc County9Washington County: 18.1 %Washington County18.1Aroostook County: 14.1 %Aroostook County14.1Lincoln County: 14 %Lincoln County14Waldo County: 13.9 %Waldo County13.9Hancock County: 13.3 %Hancock County13.3Knox County: 13.2 %Knox County13.2Penobscot County: 13.2 %Penobscot County13.2Piscataquis County: 13.2 %Piscataquis County13.2Oxford County: 12.9 %Oxford County12.9Somerset County: 12.9 %Somerset County12.9Franklin County: 12.5 %Franklin County12.5York County: 11.3 %York County11.3Androscoggin County: 10.8 %Androscoggin County10.8Cumberland County: 10.6 %Cumberland County10.6Kennebec County: 10.2 %Kennebec County10.2Sagadahoc County: 9 %Sagadahoc County9
%. 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

RankCounties2015 (%)Change on 2014
1Washington County18.1-2.5 pts
2Aroostook County14.1-3.2 pts
3Lincoln County14-2 pts
4Waldo County13.9-1.9 pts
5Hancock County13.3-3.5 pts
6Knox County13.2-3.1 pts
6Penobscot County13.2-3.3 pts
6Piscataquis County13.2-3.2 pts
9Oxford County12.9-3.5 pts
9Somerset County12.9-4.1 pts
11Franklin County12.5-3.5 pts
12York County11.3-1.4 pts
13Androscoggin County10.8-3.5 pts
14Cumberland County10.6-1.3 pts
15Kennebec County10.2-2.1 pts
16Sagadahoc County9-3.5 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-2015-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), 2015) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2015-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), 2015. U.S. Census Bureau, 6 Aug. 2026, https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2015-csv.zip. Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/maine-counties?period=2015. 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), 2015. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2015-csv.zip. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/maine-counties?period=2015.

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), 2015 [Dataset]. Available at: https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2015-csv.zip, via Invokely: https://invokely.ai/rankings/uninsured-rate-ages-18-64/maine-counties?period=2015 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_maine_by_2015,
  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), 2015}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2015-csv.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/maine-counties?period=2015. 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-2015-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), 2015
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-2015-csv.zip
L2  - https://invokely.ai/rankings/uninsured-rate-ages-18-64/maine-counties?period=2015
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/maine-counties?period=2015.
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-2015-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 18.1% in 2015, according to the U.S. Census Bureau.

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

Sagadahoc County, with 9% in 2015.

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