NOTE: Gray indicates insufficient data or a suppressed estimate.
Household sizes in the St. Louis metro area exhibit a clear core-periphery gradient, with the smallest averages (1.5–1.8 persons) concentrated in the central city zip codes near downtown St. Louis, likely reflecting higher concentrations of single-person households and rental units. The largest household sizes (3.0–3.5+) appear in select southern suburban zip codes and a pocket near the northern periphery, suggesting areas with more family-oriented housing stock. Suburban communities such as St. Peters, St. Charles, and Florissant occupy a moderate middle range (2.4–2.8), while a notable cluster of lower-than-average values extends westward from the urban core into inner-ring suburban zip codes.
Data: U.S. Census Bureau, 2023 ACS
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- Housing Vacancy Rate by Zip Code (ZCTA5) — St. Louis Metro
- % of Population without Health Insurance, by Zip Code (ZCTA5) — St. Louis Metro
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