% of Population without Health Insurance, by Zip Code (ZCTA5) — Montana

NOTE: Gray indicates insufficient data or a suppressed estimate.

Zip codes in northeastern Montana, particularly in the Fort Peck Reservation area, display some of the highest uninsured rates in the state, with several zones exceeding 30–50%, consistent with well-documented coverage gaps on tribal lands. A similar cluster of elevated uninsured rates appears in south-central Montana near the Crow and Northern Cheyenne reservations, contrasting sharply with adjacent zip codes showing rates below 10%. Western Montana's more urbanized corridors around Missoula, Kalispell, and Helena generally exhibit lower uninsured percentages, though pockets of moderate rates (10–20%) persist in surrounding rural areas.

Data: U.S. Census Bureau, 2023 ACS

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