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California's Richest Counties: San Mateo Leads Wealth Rankings

4/11/2026

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Summary

Story summary

SmartAsset (a financial site) released a study showing California's richest counties are mainly in Northern California, led by San Mateo County.
San Mateo County has the highest wealth index, with a median home value of $1.54 million.
Santa Clara County follows with a median home value of $1.5 million and median incomes above $150,000.
San Francisco ranks fourth in wealth.
Orange County ranks sixth with a median income of $113,000.

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Story summary

SmartAsset (a financial site) released a study showing California's richest counties are mainly in Northern California, led by San Mateo County.
San Mateo County has the highest wealth index, with a median home value of $1.54 million.
Santa Clara County follows with a median home value of $1.5 million and median incomes above $150,000.
San Francisco ranks fourth in wealth.
Orange County ranks sixth with a median income of $113,000.