Gilbreth is a surname. Notable people with the surname include:
Bill Gilbreth (1947–2020), American baseball player Ernestine Gilbreth Carey (1908–2006), American writer Frank Bunker Gilbreth, Jr. (1911–2001), American writer Frank Bunker Gilbreth, Sr. (1868–1924), American industrial engineer Lillian Moller Gilbreth (1878–1972), American psychologist and industrial engineer Robert Moller Gilbreth, American businessman, educator, and politician
See also Gilbreth, Inc., early management consulting firm founded by Frank and Lillian Gilbreth Gilbreath