List of Famous people born in Walnut Creek, United States of America

Gregory Sestero is an American actor and author best known for his role as Mark in the 2003 cult film The Room, as well as for his memoir The Disaster Artist, about his experiences making The Room, which itself was later adapted into a 2017 film.

Natalie Marie Coyle, known professionally as Natalie Eva Marie, is an American actress, fashion designer, model, and professional wrestler.

Sabrina Elaine Ionescu is an American professional basketball player for the New York Liberty of the Women's National Basketball Association (WNBA). She played college basketball for the Oregon Ducks. She is the NCAA all-time leader in career triple-doubles, the Pac-12 Conference all-time leader in assists, and the only NCAA Division I basketball player to record 2,000 points, 1,000 assists, and 1,000 rebounds in a career.

Michael James Ryan Busbee, known professionally as busbee, was an American songwriter, record producer, publisher, record label executive, and multi-instrumentalist.

Randall David Johnson, nicknamed "The Big Unit", is an American former professional baseball pitcher who played 22 seasons in Major League Baseball (MLB), from 1988 to 2009, for six teams, primarily the Seattle Mariners and Arizona Diamondbacks. His 303 career victories are the fifth-most by a left-hander in MLB history, while his 4,875 strikeouts place him second all time behind Nolan Ryan and first among left-handers. He holds five of the seven highest single-season strikeout totals by a left-hander in modern history. Johnson was a ten-time All-Star, won the Cy Young Award five times, and is one of only two pitchers to win the award in four consecutive seasons (1999–2002). In 1999, he joined Pedro Martínez and Gaylord Perry in the rare feat of winning the award in both the American and National Leagues. He is also one of five pitchers to pitch no-hitters in both leagues. On May 18, 2004, at the age of 40, Johnson became the oldest pitcher in major league history to throw a perfect game; he is one of seven pitchers to have thrown a perfect game and at least one other no-hitter in their careers. He is also one of 18 pitchers in history to record a win against all 30 MLB franchises. On May 8, 2001, Johnson achieved the feat of striking out 20 batters in a game, against the Cincinnati Reds.

Garett Bolles is an American football offensive tackle for the Denver Broncos of the National Football League (NFL). He played college football at the University of Utah, and was drafted by the Broncos in the first round of the 2017 NFL Draft.

Kristian Ipsen is an American diver, who has been diving competitively since 1998. Diving alongside Troy Dumais, they took the silver medal in the synchronized 3 meter springboard at the 2009 World Aquatics Championships and the bronze medal at the 2012 Summer Olympics.

Kyle Richard Gass is an American musician and actor best known for being a member of Tenacious D and a winner of a Grammy Award for Best Metal Performance, alongside longtime friend Jack Black. He also co-formed, and performs with, the bands Trainwreck and Kyle Gass Band / The Kyle Gass Company. Outside of music, Gass makes sporadic appearances as an actor; his appearances include the films Elf and Kung Fu Panda, TV shows such as Friends and Seinfeld and various music videos for bands such as Good Charlotte and I Prevail. He also hosted a YouTube channel from 2009 to 2012 called Guitarings alongside fellow Tenacious D guitarist John Konesky, and is currently hosting the 'Did We Do It' Podcast alongside Kevin Weisman.

Matthew Russell Wood is an American sound editor and voice actor. For the last 28 years, he has worked on numerous film projects, his work being credited as sound editing and sound design. He has been an innovative force within the industry, pioneering new technologies for motion pictures. He is a supervising sound editor at Skywalker Sound in Marin County, California. He also voices General Grievous in Star Wars: Episode III – Revenge of the Sith, Star Wars: The Clone Wars and various video games.

Shoshannah Stern is an American actress.