Ben 10: Alien Force is an American animated television series created by team Man of Action (a group consisting of Duncan Rouleau, Joe Casey, Joe Kelly, and Steven T. Seagle), and produced by Cartoon Network Studios. It is the sequel to Ben 10 (2005–2008), set five years later and taking a darker turn than its predecessor.

The series premiered on Cartoon Network in the United States on April 18, 2008, and on Teletoon in Canada on September 6, 2008. The series was originally produced under the working title of Ben 10: Hero Generation. Ben 10: Alien Force ran for a total of three seasons and forty-six episodes with its final episode being aired on March 26, 2010. It was nominated for four Emmy Awards, winning one for Outstanding Sound Mixing – Live Action and Animation.

A sequel series, Ben 10: Ultimate Alien, was released afterwards.