The Millionaire is an American anthology series that aired on CBS from 1955 to 1960. It was originally sponsored by Colgate-Palmolive. The series, produced by Don Fedderson and Fred Henry, explored the ways that sudden and unexpected wealth changed life, for better or for worse. It told the stories of people who were given one million dollars ($11.4 million in 2023 dollars) from a benefactor who insisted they must never know his identity, with one exception.

The series became a five-season hit during the Golden Age of Television, finishing in the Nielsen ratings at #9 for the 1955–1956 season, #13 in 1956–1957, #17 in 1957–1958 and #30 in 1958–1959. In syndication, it was known by two titles: The Millionaire and If You Had a Million.