Youth Brigade is an American hardcore punk band formed in Hollywood, Los Angeles, California, in 1980 by the brothers Mark, Adam, and Shawn Stern. The band subsequently founded BYO (Better Youth Organization). Many later punk bands cite Youth Brigade as an influence, including The Nation of Ulysses and The Briefs.

Youth Brigade have released five studio albums, including one released as The Brigade. Four of their five albums feature the band’s original lineup brothers Mark, Adam, and Shawn Stern. Bassist Bob Gnarly replaced Adam for the recording of 1985’s The Dividing Line, released as The Brigade. Adam returned in 1991 when the band reunited) and contributed to the band's 1992 EP Come Again and their next two albums Happy Hour and To Sell the Truth before leaving once again in 2007. Youth Brigade continue to tour, although other than six tracks on the 1999 album BYO Split Series Volume II, they have not released a full-length studio album since To Sell the Truth in 1996.