- Kelly Asbury, film director, writer, illustrator, voice actor[1]
- Stacey Augmon, basketball player
- Jon B., Grammy-nominated R&B singer-songwriter
- Meredith Baxter, actress
- Carlton Beals (1893-1979), journalist
- G. Vernon Bennett, Los Angeles City Council member, 1935–49
- Susie Maxwell Berning, pro golfer
- Summer Bishil, actress
- Whitney Blake, director and producer
- J. P. Blecksmith, United States Marine officer, killed in Iraq
- Alison Brie, actress
- Betty Brosmer, bodybuilder and model
- Owen Brown, abolitionist
- May Sutton Bundy (1886-1975), first American to win Wimbledon tennis singles title
- Frederick Russell Burnham (1861–1947), celebrated scout and inspiration for the Boy Scouts[2]
- Howard Burnham (1870–1917), mining engineer and spy[3]
- Sophia Bush, actress, best known for TV series One Tree Hill, and 82nd Rose Queen for 111th Tournament of Roses Parade (2000)
- Octavia Butler, award-winning science-fiction writer
- Stephen Cannell, author, television and film producer
- Christy Canyon, pornographic actress
- Cari Champion, former moderator, ESPN First Take
- Otis Chandler, publisher, Los Angeles Times
- Justin Chapman, journalist, author, actor
- 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 six teams
- Jimmy Dore, comedian
- Michael Dorn, actor
- David Ebershoff, writer
- Darrell Evans, Major League Baseball player
- Richard Feynman, Nobel Prize physicist, Caltech professor, raconteur
- Sally Field, two-time Academy Award-winning actress
- W.C. Fields, comedian, actor, juggler and writer
- Stan Freberg, comedian, satirist, recording artist
- 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
- Kristy Hawkins, IFBB professional bodybuilder
- Olive Hoskins, first woman promoted to warrant officer in the United States Army.
- Missy Franklin, swimmer, world record holder, Olympic gold medalist
- Charles Frederick Holder, inventor of big-game fishing and a founder of Pasadena's Tournament of Roses[4][5]
- Gregory C. Horn, U.S. Navy Rear Admiral
- Edwin Hubble, 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 voice of Mickey Mouse
- Pete Jolly, jazz pianist
- Lucy Jones, seismologist
- Tamala Jones, actress[6]
- Matthew Lillard, actor
- Kate Linder, actress
- Chris McAlister, professional football player
- Dana MacDuff, film producer
- Tyler MacDuff, actor
- Henry Markham, 18th governor of California
- Hugo Markl, artist, curator and creative director based in New York
- Mo Martin, LPGA golfer, 2014 British Open champion
- F. O. Matthiessen, Rhodes Scholar, Harvard professor
- Inger Miller, track and field sprint athlete
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- Robert A. Millikan, Nobel Prize physicist
- George Murdoch, WWE wrestler
- George Olah, Nobel Prize chemist, professor University of Southern California
- Aimee Ortiz, singer of rock band Radagun
- Bill Paparian, attorney, veterans' advocate and Mayor of Pasadena[7]
- Jack Parsons, rocket scientist and occultist
- Linus Pauling, Nobel Prize-winning chemist, peace activist, Caltech
- Chris Pettit, Major League Baseball outfielder[8]
- Drew Pinsky, doctor and radio/TV personality
- Durell Price, UCLA fullback[9]
- Kathleen Quinlan, actress
- Robert Reed, actor, best known as Mike Brady in The Brady Bunch television series
- George Reeves, actor, best known as star of television series Adventures of Superman
- John C. Reilly, actor
- Roger Revelle, founder of University of California, San Diego, father of concept of global warming
- Bill Richardson, governor of New Mexico
- Jackie Robinson, iconic baseball player
- Mack Robinson, Olympic athlete, brother of Jackie Robinson
- James Roosevelt, U.S. Congressman, son of President Franklin Delano Roosevelt
- David Lee Roth, lead singer for Van Halen
- Stan Sakai, cartoonist best known as creator of Usagi Yojimbo series
- Ruwanga Samath, record producer, attended John Muir High School
- Ellen Browning Scripps, heiress, publisher, 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, film director
- Sirhan Sirhan, resident of Pasadena at the time of assassination of Senator Robert F. Kennedy
- Alina Smith, musician
- Mark Smith, MLB player for five teams
- Stan Smith, professional tennis player, namesake of Stan Smith Tennis Shoe
- Phil Spector, music producer
- Brett Sterling, professional ice hockey player
- Ron Stoner, original photographer, Surfer magazine
- Kathleen Sullivan, television personality
- Brian Teacher, Australian Open tennis champion
- Teena Marie, singer-songwriter, music producer
- Kip Thorne, professor, Feynman theoretical physicist, Caltech
- Troop, R&B group
- Tannis Ann Turrentine, 74th Rose Queen for 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
- Charles Walters, film director
- Wil Wheaton, actor, writer
- Jaleel White, actor, producer, and writer
- William Wrigley, Jr., founder of Wrigley Chewing Gum, former owner of Chicago Cubs[10]
- Matt Young, MLB player for Boston Red Sox, Los Angeles Dodgers and Cleveland Indians
- Marc Yu, child music prodigy on piano and viola
- Jeff Yurak, MLB player for Milwaukee Brewers
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