NOTE: Gray indicates insufficient data or a suppressed estimate.
Household sizes in the Baltimore metro area follow a clear urban-suburban gradient, with the smallest averages (1.5–2.0 persons) concentrated in downtown Baltimore and its immediately surrounding zip codes, likely reflecting higher shares of single-person and non-family households. The largest household sizes (3.0–3.5+) cluster in the outer northern and northeastern suburban zip codes, as well as in portions of the southwest near Columbia and Ellicott City, consistent with family-oriented suburban development. A notable contrast exists on the eastern side of the metro, where pockets of higher household size appear adjacent to zip codes with markedly lower averages, suggesting sharp demographic transitions across relatively short distances.
Data: U.S. Census Bureau, 2023 ACS
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