San Mateo County, California
Income Data
At a Glance
How San Mateo County Compares
Detailed Income Statistics
Data Story
About Household Income in San Mateo County, California
San Mateo earns double the nation
San Mateo County's median household income of $156,000 more than doubles the U.S. median of $74,755, placing it among the wealthiest counties in America. Residents here earn roughly 109% above the national average, reflecting the county's concentration of tech workers and high-skill professionals. This income advantage compounds over time, creating substantial wealth-building potential.
Highest earners in California
At $156,000, San Mateo's median household income towers 79% above California's state average of $87,001, ranking it in the top tier of all 58 California counties. The per capita income of $81,980 also crushes the state average of $43,669 by nearly 88%. This is one of California's premier income strongholds.
Silicon Valley's income twin
San Mateo ($156,000) nearly matches neighboring Santa Clara County ($159,674), both anchored by tech corridors and biotech clusters in the Bay Area. Santa Cruz County ($109,266) and Solano County ($99,994) lag significantly behind, earning roughly $47,000 and $56,000 less per household respectively. The Bay Area's geography creates stark income divides within a single region.
High income, higher costs
Despite earning the state's highest incomes, San Mateo residents spend 22.3% of income on rent—above the 30% affordability threshold—because median home values hit $1,494,500. The county's extreme housing costs absorb a significant portion of even these substantial earnings. Financial planning here must prioritize long-term wealth strategies beyond housing.
Leverage Bay Area income gains
With median household income exceeding $156,000, San Mateo households have significant capacity to invest beyond housing costs. Consider diversifying into retirement accounts, index funds, and long-term equity positions to build generational wealth. The county's high earners are positioned to achieve financial independence faster than nearly any other region in America.
Frequently Asked Questions
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Income Comparison Calculator
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Your income is above the San Mateo County median
County median: $156,000 per year
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vs. State Average
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vs. National Median
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Your monthly income ($13,000) vs. median rent ($2,893/mo). A ratio of 3.3x or higher means rent is under 30% of income.
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Compare RatesData: U.S. Census Bureau, American Community Survey (ACS) 5-Year Estimates (2019-2023) — Informational only. Not financial or legal advice.