- Stacey Augmon, basketball player
- Edward Marques, Top Sales Producer at Ebix CRM
- Jon B., Grammy nominated R&B Singer-Songwriter
- G. Vernon Bennett, Los Angeles City Council member, 1935–49
- Summer Bishil, actress
- J. P. Blecksmith, United States Marine officer, killed in Iraq
- Alison Brie, actress
- Owen Brown (abolitionist), abolitionist
- Frederick Russell Burnham (1861–1947), celebrated scout and inspiration for the Boy Scouts[1]
- Howard Burnham (1870–1917), mining engineer and spy.[2]
- Sophia Bush, actress, 82nd Rose Queen for the 111th Tournament of Roses Parade (2000)
- Octavia Butler, award winning science-fiction writer
- Stephen Cannell, author, television and motion picture producer
- Otis Chandler, former publisher, heir, Los Angeles Times
- Julia Child, celebrated author and television chef
- Megan Chinen, 86th Rose Queen of the 115th Tournament of Roses Parade (2004)
- Jeff Cirillo, MLB player for the Milwaukee Brewers, Colorado Rockies, Seattle Mariners, San Diego Padres, Minnesota Twins, and Arizona Diamondbacks
- Jimmy Dore, comedian
- Michael Dorn, actor
- David Ebershoff, writer
- Albert Einstein, Nobel prize physicist, Caltech (visiting) Professor
- Stan Freberg, comedian, satirist, recording artist
- Richard Feynman, Nobel prize physicist, Caltech professor, raconteur
- Sally Field, American actress
- Paul Fussell, critic and historian
- Murray Gell-Mann, Nobel prize physicist, Caltech
- George Ellery Hale, astrophysicist, Caltech professor, founder Mt. Wilson Observatory
- Harry Hamlin, actor
- Charles Frederick Holder, inventor of big-game fishing and a founder of Pasadena's Tournament of Roses[3][4]
- Gregory C. Horn, U.S. Navy Rear Admiral
- Edwin Hubble, Nobel prize astronomer, namesake for the Hubble Telescope, Caltech professor
- Howard W. Hunter, 14th president of the Church of Jesus Christ of Latter-day Saints
- Lance Ito, judge, Los Angeles Superior Court
- Bret Iwan, fourth and current voice of Mickey Mouse
- Pete Jolly, jazz pianist
- Tamala Jones, actress[5]
- Dana MacDuff, film producer
- Tyler MacDuff, actor
- Henry Markham, 18th governor of California
- Chris McAlister, professional football player (NFL)
- Inger Miller, track and field sprint athlete
- Robert A. Millikan, Nobel prize physicist
- George Murdoch, WWE wrestler
- George Olah, Nobel prize chemist, professor University of Southern California
- Aimee Ortiz, singer of the rock band Radagun
- Bill Paparian, Attorney, Veterans advocate and former Mayor of Pasadena[6]
- Jack Parsons, rocket scientist and occultist
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- George S. Patton, WWII General (lived in neighboring San Marino)
- Linus Pauling, Nobel prize winning chemist, peace activist, Caltech
- Drew Pinsky, medical doctor and radio talk show host
- Durell Price, former UCLA starting fullback[7]
- Kathleen Quinlan, actress
- Robert Reed, actor, best known as Mike Brady in The Brady Bunch television series
- George Reeves, actor, best known as the original Superman in the television series, Adventures of Superman
- John C. Reilly, actor
- Bill Richardson, governor of New Mexico
- Roger Revelle, founder the University of California San Diego, father of concept of global warming
- Jackie Robinson, baseball player
- Mack Robinson, Olympic athlete.
- James Roosevelt, United States Congressman, son of Franklin Delano Roosevelt, United States President
- David Lee Roth, lead singer for Van Halen
- Jethro Rothe-Kushel, film director and producer
- Stan Sakai, cartoonist best known as the creator of the Usagi Yojimbo series.
- Ruwanga Samath, record producer, attended John Muir High School
- Ellen Browning Scripps heiress, publishing, philanthropist
- Christian Serratos, actress
- John Severson, founder of Surfer (magazine), publisher, photographer
- William Shockley, Nobel prize physicist, Caltech professor, inventor of the transistor
- Alvin Simon, restaurateur who revitalized Old Pasadena
- John Singleton, director
- Sirhan Sirhan, resident of Pasadena at the time of the assassination of Senator Robert F. Kennedy
- Alina Smith, musician
- Mark Smith, MLB player for the Baltimore Orioles, Pittsburgh Pirates, Florida Marlins, Montreal Expos, and the Milwaukee Brewers
- Stan Smith, professional tennis player, namesake of the Stan Smith Tennis Shoe
- Phil Spector, music producer
- Ron Stoner, original photographer, Surfer (magazine)
- Brian Teacher, Australian Open Tennis Champion
- Teena Marie, singer/songwriter, music producer
- Kip Thorne, professor, Feynman theoretical physicist, Caltech
- Tannis Ann Turrentine, 74th Rose Queen for the 103rd Tournament of Roses Parade (1992)
- Chase Utley, professional baseball player, Philadelphia Phillies
- Peter Vagenas, soccer player
- Alex Van Halen, drummer for Van Halen
- Eddie Van Halen, lead guitarist for Van Halen
- Duong Van Minh, exiled president of South Vietnam
- Jacque Vaughn, professional basketball player
- Wil Wheaton, actor, writer
- Jaleel White, actor, producer, and writer
- William Wrigley Jr., founder Wrigley Chewing Gum, owner Wrigley field, Chicago Cubs[8]
- Jamie Yager, Mixed Martial Artist
- Jeff Yurak, MLB player for the Milwaukee Brewers
- Marc Yu, child music prodigy on the piano and viola
- Marc Narvaez, the Sausage King of Los Angeles
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