Snapshot of the Region

Snapshot of the Region

Silicon Valley Population Clock


As of

Based on California Department of Finance January 2020 population data for Fremont, Newark, Union City, and Scotts Valley, and July 2020 population data for Santa Clara and San Mateo Counties, and estimated using the most recent growth rates available. Estimates for births, deaths and migration are based on July data for San Mateo and Santa Clara Counties only.

What is Silicon Valley?

“Silicon Valley” is a concept – an ecosystem in and around the Santa Clara Valley, a region in southern portion of California’s San Francisco Bay Area. It’s boundaries are nebulous. For the purposes of examining data and trends, however, the geographical boundaries of Silicon Valley must be defined.

In the Silicon Valley Index publication and on, Silicon Valley has been defined as: Santa Clara County (all), San Mateo County (all), and the cities of Fremont, Newark, and Union City (in Alameda County), and Scotts Valley (in Santa Cruz County). Because San Francisco is a vibrant contributor to the tech economy, data for the City/County of San Francisco are included in various charts throughout the Index. Some charts may include subsets of the region due to limited data availability, as noted.

Map of Silicon Valley

Click on a pie chart to view full size:

pie chart pie chart pie chart pie chart

*Oceania includes American Samoa, Australia, Cook Islands, Fiji, French Polynesia, Guam, Kiribati, Marshall Islands, Federated States of Micronesia, Nauru, New Caledonia, New Zealand, Northern Mariana Islands, Palau, Papua New Guinea, Samoa, Solomon Islands, Tonga, Tuvalu, Vanuatu, Wallis and Futuna.

Note: Area, Population, Jobs, and Average Annual Earnings figures are based on the city-defined Silicon Valley region; whereas Net Foreign Immigration and Domestic Migration, Adult Educational Attainment, Age Distribution, Ethnic Composition, and Foreign Born figures are based on Santa Clara and San Mateo County data only. Percentages may not add up to 100% due to rounding.

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Download the data for each pie chart:

Key COVID-19 Health Metrics, through January 2021; vaccinations through mid-February infographic

Note: County cases, deaths, and tests through January 31, as reported on February 12 (San Mateo County), February 14 (Santa Clara County), and February 13 (San Francisco); San Francisco test total is through January 21. Share vaccinated is calculated as a percentage of the population age 16 and over (U.S. Census Bureau, 2019 American Community Survey). County-level data is from the individual county health department dashboards. California cases, deaths, testing, and vaccines administered are from the state dashboard as of February 1; the total number of California residents who have received a vaccine, by doses, are from the Centers for Disease Control and Prevention COVID Data Tracker. Vaccine data are through February 12 (San Mateo County), February 14 (Santa Clara County and California), and February 13 (San Francisco).

Land Area infographic

*Silicon Valley Percentage of California GDP includes San Mateo and Santa Clara counties only.

Data Sources: Land Area (U.S. Census Bureau, 2010); Population (California Department of Finance, 2020); GDP (Moody’s, 2020); Venture Capital (Thomson ONE, 2020); Patent Registrations (U.S. Patent and Trademark Office, 2020 through December 12); Initial Public Offerings (Renaissance Capital, 2020); Jobs (U.S. Bureau of Labor Statistics, Quarterly Census of Employment and Wages; EMSI, Q2 2020); Angel Investment (Crunchbase, 2020); Mergers & Acquisitions (Factset Research Systems, 2020).

Institute Video Series (2017) on Silicon Valley Trends

The Institute piloted an Indicators video series in mid-2017, engaging the local community with weekly texts to their mobile devices. The videos included a variety of facts about Silicon Valley’s economic and community health trends, and featured local experts from Joint Venture’s network of regional leaders.

Learn more and watch videos