NOTE: Gray indicates insufficient data or a suppressed estimate.
Northern Delaware's zip codes near Wilmington display significant variation, with affluent suburban areas reaching above 95% high school graduation rates while a cluster of zip codes in the city core drops below 75%, representing the starkest intra-regional contrast in the state. Central and southern Delaware generally maintain graduation rates in the 80–90% range, though a notable pocket of lower attainment (around 60–70%) appears in the southeastern coastal area near the lower Sussex County region. The highest-performing zip codes concentrate along the northern suburban corridor and select beach communities, while the lowest rates align with areas of higher poverty and immigrant populations in Wilmington and parts of southern Delaware's agricultural zones.
Data: U.S. Census Bureau, 2023 ACS
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