Mayhem Festival 2009 was the second annual North American Mayhem Festival founded by Kevin Lyman.

In July 2009 a DLC song pack was sold in the music video game Rock Band 2.

Band lineup as released by the press release from the Mayhem Festival website and bands page of the Mayhem Festival website.

[1][2] Mayhem Festival 2009 tour dates as seen on official website.

[7] Some dates that were originally seen on the press release have been removed with no explanation given.