NOTE: Gray indicates insufficient data or a suppressed estimate.
Household sizes in the Philadelphia metro skew smallest in the urban core, with zip codes in Center City and surrounding North Philadelphia neighborhoods dipping below 2.0 persons per household, consistent with high concentrations of single-occupant apartments and student housing. The largest households—averaging 3.0 to 3.5+ persons—cluster in the outer suburban and exurban ring, particularly in the northern reaches of Bucks County and scattered pockets of southern Chester and Delaware counties. A notable contrast exists between the King of Prussia/Norristown corridor, which trends toward moderate sizes around 2.4–2.6, and the immediately adjacent western suburbs where values climb above 2.8, suggesting distinct housing stock and demographic composition within a short geographic span.
Data: U.S. Census Bureau, 2023 ACS
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