NOTE: Gray indicates insufficient data or a suppressed estimate.
Married-couple households concentrate most heavily in the outer suburban ring, particularly in the western zip codes around St. Peters and southwestern Jefferson County, where rates frequently exceed 70–80%. A stark contrast emerges in the urban core of St. Louis City and the inner north-county suburbs near Florissant, where married-couple shares drop below 20–30%, forming a deep purple cluster that extends northward from downtown. The gradient from core to periphery is notably sharper on the north side of the metro than on the south, where moderate rates in the 50–60% range persist closer to the city boundary.
Data: U.S. Census Bureau, 2023 ACS
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