NOTE: Gray indicates insufficient data or a suppressed estimate.
Zip codes in and around Lynn and portions of East Boston exhibit the highest uninsured rates in the metro, reaching into the 15–25% range, reflecting concentrations of immigrant and lower-income communities with reduced access to employer-sponsored coverage. The suburban periphery to the west and southwest—including Newton, Waltham, and areas further out—consistently registers among the lowest uninsured rates, generally below 5%, consistent with higher household incomes and professional employment. A notable gradient is visible radiating outward from the urban core, though inner Boston zip codes display considerable internal variation, with some downtown and South Boston areas showing moderate rates alongside heavily uninsured neighbors in Dorchester and Roxbury.
Data: U.S. Census Bureau, 2023 ACS
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