U.S. Citizens (% of Population Over 18) by Zip Code (ZCTA5) — Alabama

NOTE: Gray indicates insufficient data or a suppressed estimate.

The vast majority of Alabama zip codes report U.S. citizenship rates above 95% among the adult population, with near-universal citizenship (99–100%) predominating across rural areas in the southern and western portions of the state. Notable clusters of lower citizenship rates (85–92%) appear in the northern region around Huntsville and the Tennessee Valley, as well as scattered zip codes in the Birmingham metro area and parts of the central-southeast corridor, likely reflecting concentrations of immigrant populations near major employment centers. A handful of zip codes in the far north dip below 85%, representing the lowest citizenship percentages in the state and suggesting localized non-citizen communities tied to specific industries or university populations.

Data: U.S. Census Bureau, 2023 ACS

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