NOTE: Gray indicates insufficient data or a suppressed estimate.
Married-couple households concentrate most heavily in the suburban periphery, with zip codes west of Katy, southwest toward Sugar Land, and south near Friendswood and League City consistently exceeding 70–80% of all households. The urban core of Houston and immediately surrounding zip codes display the lowest shares, frequently falling below 30%, forming a distinct dark-purple cluster that radiates outward along major corridors. A notable east-west asymmetry exists, as western and southwestern suburbs generally register higher married-couple percentages than their eastern and southeastern counterparts at comparable distances from downtown.
Data: U.S. Census Bureau, 2023 ACS
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