NOTE: Gray indicates insufficient data or a suppressed estimate.
Southeastern Idaho, particularly in the areas around the upper Snake River Plain and near the Utah border, displays consistently elevated household sizes (3.0–3.5+), likely reflecting the region's higher proportion of young families and cultural demographics. In contrast, several urban zip codes in the Boise metropolitan area and college-town areas such as Moscow in the north exhibit notably smaller household sizes (1.5–2.0), consistent with higher concentrations of single-person households and student populations. The central mountainous region of Idaho shows substantial data gaps (gray areas) due to sparse population, while the panhandle displays a heterogeneous mix ranging from smaller households in Coeur d'Alene's urban core to larger averages in surrounding rural and suburban zip codes.
Data: U.S. Census Bureau, 2023 ACS
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