NOTE: Gray indicates insufficient data or a suppressed estimate.
Zip codes in the central and north St. Louis City corridors exhibit the highest uninsured rates, reaching 15–20% or more, with a particularly pronounced cluster along the central-south portion of the city where teal and green shading indicates rates well above the metro average. In contrast, the outer suburban ring—especially the western and southwestern zip codes near St. Peters and parts of St. Charles County—consistently registers uninsured rates below 5%, reflecting stronger employer-sponsored coverage typical of higher-income suburban communities. The Florissant area and northern St. Louis County occupy a middle tier, generally ranging between 5–10%, serving as a transitional zone between the lower-coverage urban core and the well-insured outer suburbs.
Data: U.S. Census Bureau, 2023 ACS
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