NOTE: Gray indicates insufficient data or a suppressed estimate.
The Central Valley — particularly the San Joaquin Valley from Fresno through Bakersfield — stands out as a consistent band of high average household sizes (3.0–3.5+), likely reflecting larger family structures in agricultural communities with significant Latino populations. Coastal urban cores, especially San Francisco, parts of Los Angeles's Westside, and San Diego's central neighborhoods, display notably lower averages (1.5–2.2), consistent with higher concentrations of single-person households and smaller rental units. The Inland Empire and portions of eastern Los Angeles County form another high-density cluster rivaling the Central Valley, contrasting sharply with adjacent low-value zip codes in downtown LA and beach communities just miles away.
Data: U.S. Census Bureau, 2023 ACS
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