NOTE: Gray indicates insufficient data or a suppressed estimate.
Zip codes in the East Bay suburbs east of Fremont and in parts of the Tri-Valley area exhibit the highest married-couple household rates, frequently exceeding 70%, while central San Francisco and downtown Oakland zip codes cluster at the lowest end of the scale, often below 30%. A clear urban-suburban gradient is visible, with married-couple percentages rising steadily as distance increases from the dense urban cores of San Francisco and Oakland toward peripheral communities like Antioch, Concord, and the southern San Jose exurbs. Notable pockets of low married-couple rates also appear near Daly City and specific zip codes adjacent to university or high-density rental areas throughout the metro.
Data: U.S. Census Bureau, 2023 ACS
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