NOTE: Gray indicates insufficient data or a suppressed estimate.
Montana's zip codes are predominantly high in non-Hispanic white population share, with most areas exceeding 80%, but stark exceptions cluster around Native American reservation lands—particularly in the north-central region (likely the Blackfeet and Fort Belknap reservations), the northeast (Fort Peck), and south-central areas (Crow and Northern Cheyenne reservations), where percentages drop below 20-40%. The northwestern corner near Flathead Lake also displays notably lower white population shares, corresponding to the Flathead Reservation. Rural eastern Montana and the western mountain communities consistently register among the highest non-Hispanic white percentages statewide, creating a sharp demographic contrast with reservation-adjacent zip codes.
Data: U.S. Census Bureau, 2023 ACS
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