Why? (styled as WHY?) is an American alternative hip hop and indie rock band. The band was founded in 2004 by Cincinnati rapper and singer Yoni Wolf, who had been using Why? as his stage name since 1997. In addition to Wolf, who serves as lead vocalist and multi-instrumentalist, the band consists of multi-instrumentalists and backing vocalists Doug McDiarmid and Matt Meldon, and drummer and backing vocalist Josiah Wolf, who is Yoni Wolf's older brother.

Why? has released eight studio albums, along with several extended plays, demo albums, and live albums, since their inception. Yoni Wolf's final solo album under the Why? moniker, 2003's Oaklandazulasylum, is typically considered part of the band's discography. Their first album as a full band was 2005's Elephant Eyelash. They followed this album with Alopecia (2008), Eskimo Snow (2009), Mumps, Etc. (2012), Moh Lhean (2017), AOKOHIO (2019), and The Well I Fell Into (2024).