Conspiracy of One is the sixth studio album by the American punk rock band The Offspring. It was released on November 14, 2000 debuting at 9 on the US Billboard 200 with around 125,000 copies sold in its first week, and has sold more than 1 million copies worldwide. It is the follow-up to the commercially successful Americana.
The Offspring had come out in support of file sharing, claiming it does not hurt sales. This album was originally planned to be released directly on their website before retail, until their label threatened to sue.
Conspiracy of One is also the band's final studio album with the "classic" line-up, with drummer Ron Welty leaving the band in early 2003 to pursue his career with Steady Ground.