Hoobastank (sometimes stylized as "h∞bastank") is an American (formed in 1994 in Agoura Hills, California) post-grunge band best known for their crossover hit "The Reason" (2003) and by their continued success in the modern rock market.

Vocalist Doug Robb met with guitarist Dan Estrin in a high school battle of the bands competition and decided to form a band. They recruited Markku Lappalainen and Chris Hesse to form Hoobastank. In an interview with Yahoo's Launch, Doug Robb said the name had no particular meaning.