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

NOTE: Gray indicates insufficient data or a suppressed estimate.

Most of Idaho's zip codes report U.S. citizenship rates above 95% among the adult population, with the yellow-dominant northern and western regions reflecting near-universal citizenship. Notable exceptions cluster in the south-central agricultural corridor and parts of the southeast, where several zip codes drop below 80%, likely corresponding to areas with significant immigrant labor in farming and food processing. A distinct dark-purple cluster appears in the central part of the state near the Sun Valley/Blaine County area, suggesting a concentrated non-citizen population potentially tied to service-industry and resort employment.

Data: U.S. Census Bureau, 2023 ACS

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