% of Population without Health Insurance, by Zip Code (ZCTA5) — Maryland

NOTE: Gray indicates insufficient data or a suppressed estimate.

Zip codes in the Baltimore–Washington corridor and parts of Prince George's County exhibit some of the highest uninsured rates in the state, with several areas reaching 25–35%, likely reflecting concentrations of immigrant and lower-income populations. Western Maryland and the rural Eastern Shore generally display moderate uninsured rates in the 5–15% range, while affluent suburban zip codes in Montgomery, Howard, and Anne Arundel counties consistently fall below 5%. A few isolated zip codes near Baltimore City stand out with notably elevated rates approaching or exceeding 30%, creating sharp contrasts with neighboring areas that have near-universal coverage.

Data: U.S. Census Bureau, 2023 ACS

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