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- Walter A. Haas, Jr. – chief executive officer of Levi Strauss & Co.
- Steven C. Hackett – economist (Humboldt State University)
- Gene Hackman – actor (The French Connection)
- Sammy Hagar – musician (Van Halen)
- Merle Haggard – country music singer
- Joseph Hahn – painter, director, musician (Linkin Park)
- Jackie Earle Haley – actor (Bad News Bears)
- Mark Hamill – actor (Star Wars)
- Laird Hamilton – surfer
- Harry Hamlin – actor (Clash of the Titans)
- MC Hammer – musician
- Kirk Hammett – musician (Metallica)
- Daniel Handler – Lemony Snicket
- Colin Hanks – actor (King Kong)
- Tom Hanks – actor, director, producer
- Jeff Hanneman – guitarist (Slayer)
- Dan Haren – professional baseball player (Oakland Athletics)
- Mariska Hargitay – actress (Law & Order: SVU)
- Jeff B. Harmon – film producer, director, actor
- Henry Harrower – endocrinologist
- Josh Hartnett – actor
- Kevin Harvick – NASCAR driver
- Teri Hatcher – actress
- Davey Havok – lead singer of AFI
- Lyn-Z Adams Hawkins – professional skateboarder
- Julie Hayek – Miss USA 1983
- Dennis Haysbert – actor (24)
- William Randolph Hearst – newspaper publisher
- Patty Hearst – actress and newspaper heiress (Symbionese Liberation Army)
- Lacie Heart – pornographic actress and nude model
- Christy Hemme – professional wrestler and model
- Mariel Hemingway – actress (Manhattan)
- Pamela Hensley – actress
- Keith Hernandez – baseball player (New York Mets)
- James Hetfield – musician (Metallica)
- Jason Hirsh – baseball player
- Dustin Hoffman – actor
- Trevor Hoffman – professional baseball player (San Diego Padres)
- Brenda Holloway – singer and songwriter
- Mike Holmgren – football coach (Seattle Seahawks)
- Mark Hoppus – Blink-182
- Taylor Horn – singer and actress
- James Horner – composer
- Sam Horrigan – actor (Little Giants)
- Nichkhun Horvejkul – Thai-American singer and rapper of 2PM
- C. Thomas Howell – actor (The Outsiders (film), Red Dawn)
- Jerry Hsu – skateboarder
- Barry Hunau – illustrator
- William Hung – (American Idol)
- Helen Hunt – actress (Mad About You)
- Vanessa Hudgens – actress and singer (High School Musical)
- Kate Hudson – actress
- Terry Huntingdon – Miss USA 1959
- Timothy Hutton – actor
- Tiffany Hwang – singer (Girls' Generation)
Read more about this topic: List Of People From California