NOTE: Gray indicates insufficient data or a suppressed estimate.
High school graduation rates across Colorado zip codes generally exceed 85%, with the highest concentrations (95–100%) visible in mountain resort communities, suburban areas north and south of Denver, and portions of the Eastern Plains. Notable pockets of lower attainment (below 70%) appear in several south-central and southeastern zip codes, likely corresponding to rural communities in the San Luis Valley and areas near the New Mexico border with historically underserved populations. The Denver metro area displays significant intra-urban variation, with some central and northern Denver zip codes dropping into the 70–80% range while adjacent suburban zip codes in Douglas County and Boulder County consistently reach above 95%.
Data: U.S. Census Bureau, 2023 ACS
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