Snapshot of the Region

Snapshot of the Region

Silicon Valley Population Clock


As of

Based on California Department of Finance January 2021 population data for Fremont, Newark, Union City, and Scotts Valley, and July 2021 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.

1. For 2015-2019; estimated 38.8% in 2020.

2. For 2015-2019; estimated 10% Less than High School, 13% High School Graduate, 21% Some College or Associate’s Degree, 29% Bachelor’s Degree, and 27% Graduate or Professional Degree in 2020.

Land Area infographic

*Silicon Valley shares of California GDP & Millionaire Households includes San Mateo and Santa Clara counties only.

Data Sources: Land Area (U.S. Census Bureau, 2010); Population (California Department of Finance, E-4 Estimates, 2021); Millionaire Households (Claritas, 2022); GDP (Moody’s, 2021); Venture Capital (Thomson ONE, 2021); Patent Registrations (U.S. Patent and Trademark Office, 2021 estimate based on data through September 21); Initial Public Offerings (Renaissance Capital, 2021); Jobs (U.S. Bureau of Labor Statistics, Quarterly Census of Employment and Wages; JobsEQ, Q2 2021); Angel Investment (CB Insights, 2021); Mergers & Acquisitions (Factset Research Systems, 2021).

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