NOTE: Gray indicates insufficient data or a suppressed estimate.
The south-central region of Washington—encompassing the Yakima Valley and portions of the Columbia Basin—displays consistently elevated household sizes (3.0–3.5+), likely reflecting the area's larger agricultural families and Hispanic demographic concentrations. In contrast, urban cores around Seattle, Bellingham, and Olympia exhibit notably smaller average household sizes (1.5–2.2), consistent with higher concentrations of single-person households and smaller rental units. The eastern half of the state generally trends toward moderate household sizes (2.4–2.8), with scattered pockets of larger households near communities such as Moses Lake and the Tri-Cities area.
Data: U.S. Census Bureau, 2023 ACS
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