The Greatest Generation is a term sometimes used to denote the younger half of what is often referred to as the G.I. Generation. The term is derived from the title of a best-selling book by Tom Brokaw and is generally assumed to mean those born in the United States from about 1911 through 1924, with an alternate label, that of the Interbellum Generation, sometimes applied to persons born from 1901 through 1910.

In contrast to the Interbellum Generation, whose children were predominantly members of the Silent Generation, the Greatest Generation went on to give birth to the majority of the Baby Boomers, who then challenged their authority during the turbulent 1960s and early 1970s, especially over the issue of the Vietnam War.

Members of the Greatest Generation held the office of President of the United States continuously from 1969 until 1993 (Richard Nixon, Gerald Ford, Jimmy Carter, Ronald Reagan and George H.W. Bush).