Wealth and income inequality in the Bay Area is stark, worse than California and the country as a whole, and worsening.
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Silicon Valley billionaires hold 15 times more liquid wealth than the bottom half of all households in Santa Clara and San Mateo counties, according to the 2025 Silicon Valley Index, an annual report slated to be released Friday.
But there are more than a handful of super-rich in the Bay Area. The wealthiest 1% of Silicon Valley, about 9,000 households, hold a whopping 42% of the region’s collective wealth, about $421 billion.
And that gap between the richest and the rest is growing. “The top 10% has 71% of the wealth,” said Russell Hancock, president of Joint Venture Silicon Valley, up one percentage point in a year. Wealth for the bottom half remained at 1%.
There are 56 billionaires and about 145,000 millionaires who call Silicon Valley home, according to the newest estimates. And per capita income in San Mateo and Santa Clara counties was $157,100 in 2023, slightly lower than in San Francisco but more than twice the U.S. per capita income of $70,000 and nearly twice the $81,000 average for California.
Meanwhile, “a significant portion of the population faces significant economic hardship,” the report says. “An estimated 30% of Silicon Valley households do not earn enough to meet their basic needs without assistance.”
Among the bottom half are 110,000 households, 12.3%, that have zero or negative wealth. Another 10.1% have under $5,000, and another 6.1% have between $5,000 and $10,000.
Because so many households have little to no wealth, wages and income are the critical metrics for most. And while income in the region is much higher than statewide and national averages and has grown quickly, the biggest gains have been for those at the top already.
Income for those with a graduate or professional degree has grown the most since 2006
Residents in Santa Clara and San Mateo counties who are high school graduates, and those with some college have barely seen an increase in their income in the past 15 years.
“Silicon Valley’s income divide has grown twice as quickly as that of the state and nation, since the end of the Great Recession,” according to the report, and “the income gap between residents of varying educational attainment levels is much wider in Silicon Valley than in California or the United States as a whole.”
Those with a bachelor’s or graduate degree are the only residents who have seen a notable increase in income in the past two decades.