NOTE: Gray indicates insufficient data or a suppressed estimate.
Uninsured rates across Maine's zip codes exhibit considerable geographic variation, with the highest concentrations (20–25%+) appearing in scattered rural areas of the northern interior and along portions of the Downeast coast, while southern coastal and suburban zip codes around Portland and its commuter belt generally report rates below 5–10%. A notable cluster of very low uninsured rates is visible in the southernmost tip of the state, likely reflecting higher employer-sponsored coverage and greater access to insurance marketplaces in more urbanized areas. The large, sparsely populated zip codes of Aroostook County and the northern woods show a patchwork pattern, with some areas reporting moderate-to-high uninsured rates adjacent to zones with no reported data (gray), reflecting limited population density and potential data suppression.
Data: U.S. Census Bureau, 2023 ACS
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