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

NOTE: Gray indicates insufficient data or a suppressed estimate.

The vast majority of North Dakota zip codes report U.S. citizenship rates above 95% among the adult population, with the highest concentrations of yellow (near 100%) spread broadly across the central and western portions of the state. Notable pockets of lower citizenship rates—appearing in teal and green shades around 85–90%—cluster in the northwest near the Williston area, likely reflecting oil industry labor migration, as well as in scattered zip codes in the northeast near Grand Forks and in the Fargo metropolitan area along the eastern border. Several gray (no data) zip codes appear in sparsely populated western regions, consistent with areas that may fall below Census reporting thresholds.

Data: U.S. Census Bureau, 2023 ACS

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