NOTE: Gray indicates insufficient data or a suppressed estimate.
Central Washington zip codes—particularly in the Yakima Valley and parts of the Columbia Basin—exhibit the highest uninsured rates, with several ZCTAs exceeding 25-30%, likely reflecting large agricultural worker populations with limited employer-sponsored coverage. The Puget Sound metro corridor from Seattle through Tacoma and extending north toward Bellingham generally maintains lower uninsured rates in the 5-10% range, consistent with higher rates of employer-based and marketplace coverage in urban centers. A notable east-west gradient persists across the state, with rural eastern Washington ZCTAs trending substantially higher than their western counterparts, though pockets of elevated uninsurance also appear in rural southwest Washington and parts of the Olympic Peninsula.
Data: U.S. Census Bureau, 2023 ACS
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