Tech

Trump made unprecedented inroads in Silicon Valley this election

A Make America Great Again hat draped over a computer
iStock; Rebecca Zisser/BI
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Silicon Valley, long considered a progressive stronghold, has begun to shift toward Donald Trump, according to new voting data analyzed by Business Insider.

Across the three San Francisco Bay Area counties that constitute the epicenter of America's tech industry, there was a marked bump in support for Donald Trump in the latest presidential election, and a corresponding decrease in support for Kamala Harris and the Democrats, provisional voter data shows.

California can take weeks to tally all its ballots, so the final totals won't be known for some time. But with well over 95% of the votes counted in San Francisco, Santa Clara, and San Mateo counties as of this week, a trend has emerged.

Among the voting citizens of Santa Clara county, home of Apple, Google, and Nvidia, 28.1% cast their ballot for Donald Trump this year. That's up from four years ago, and notably higher than in 2016.

Meanwhile, 68.1% voted for Harris. That was down from 72.6% who backed Joe Biden four years ago, and 73.1% who voted for Hilary Clinton in 2016, according to data compiled by the California Secretary of State.

In San Mateo county, where Facebook parent company Meta is headquartered, the vote shifted from 77.9%-20.2% Republican-Democrat to 73.5%-23.2% this cycle.

And San Francisco county's vote for Trump went from 9.3% in 2016 to 15.5% this year.

These numbers show that Trump and Republicans are still a long way off from gaining any real majorities in Silicon Valley. However, even this relatively small shift suggests that the region, and the tech industry, is becoming less firmly Democrat — and comes as some tech leaders grow more pragmatic about politics.

Meta CEO Mark Zuckerberg previously publicly supported Democratic candidates, but didn't this year. Venture capital power players Marc Andreessen and Ben Horowitz said they were supporting Trump this summer, though Horowitz also provided funding for the Harris campaign.

While Elon Musk is based in Texas these days, many of his companies, including Tesla, are still very active in Silicon Valley. He sunk hundreds of millions of dollars into helping reelect Trump this year, is undoubtedly the president-elect's most high-profile supporter in tech.

Incoming Vice President JD Vance once worked in venture capital and is seen as a protégé of PayPal cofounder and investor Peter Thiel, one of tech's most influential conservative voices.

Some of this comes down to self-interest. Trump, with Musk in support, has promised to cut regulations, which could help Silicon Valley startups grow more quickly.

"The most exciting thing of all will be putting Elon in charge of government efficiency," said Ben Narasin, a VC based in Atherton, in San Mateo county. "He's going to take a chainsaw through calcified butter, and it's going to be awesome to attack the bloat and overreach that we've had in the government."

The trend toward Trump in the Silicon Valley electorate mirrors statewide and national trends. Nationwide, the Democrats fell from 51.3% to 48.3%, while the GOP rose from 46.9% to 49.9%.

In California, Democrat voteshare dropped from 63.5% in 2020 to 58.6%, as of the data available on Tuesday.

Editor's note: This story was originally published on November 12. It was updated on November 26 after more ballots were counted. This new data did not materially change the story's findings.

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Rob Price was a senior correspondent at Business Insider, based in San Francisco. He wrote investigations and long-form features about platforms, people, and power in Silicon Valley.His stories variously led to attorney general investigations, large-scale internal reviews at major tech companies, high-profile personnel departures, citation by state and federal lawmakers, and the closure of a well-funded startup. His 2022 story on the Bitfinex hack is being adapted into a feature film, and in 2024 he received an SPJ NorCal Excellence in Journalism award for his reporting on AI and relationships.Rob's scoops and exclusive stories were cited by The New York Times, Bloomberg, the BBC, Associated Press, Reuters, CNBC, Politico, The Guardian, Axios, and many other national and international publications. His writing has also been published in or syndicated by The Washington Post, The Independent, Vice, Slate, and elsewhere, and he appeared on CNN, the BBC, CBS, Reuters, ABC Australia, and other broadcast media to discuss technology, business, and culture.He worked for Business Insider from 2015 to 2025. Prior to joining the features team, Rob covered Facebook and Silicon Valley, and before that wrote about tech business, policy, and the gig economy in London. Between September and October 2019, he was acting executive editor for Business Insider's UK bureau. He also sat on the board of directors for the San Francisco Press Club, the leading non-profit media advocacy group in the Bay Area, and was a volunteer crew member at the Marine Mammal Center, the world's largest animal hospital for marine mammals. You can contact Rob Price via email at robaeprice@gmail.com, or +1 650-636-6268 (Signal / WhatsApp / Cell). Selected stories:— They spoke out against their employer. Then they were hit with trade secrets suits. The rise of 'shadow stand-ins'App, Lover, Muse: Inside a 47-year-old Minnesota man's three-year relationship with an AI chatbotDeel Speed: The inside story of a $12 billion HR startup's breakneck growthPrivate islands, flying cars, and psychedelic parties: Inside the wild post-Google lives of Larry Page and Sergey Brin'I want your Instagram account': First came the threatening texts, followed by the SWAT teams. Then someone wound up dead.Inside Iconiq: How Mark Zuckerberg's banker built a secret Silicon Valley empire and made billionsGaia was a wildly popular yoga brand. Now it's a publicly traded Netflix rival pushing conspiracy theories while employees fear the CEO is invading their dreamsA drunken late-night assault allegation has roiled the secretive world of Mark Zuckerberg's private family office. Personal aides are speaking out about claims that household staff endured sexual harassment and racism from their colleagues.