Bon Iver is a Grammy Award winning folk band from Eau Claire, Wisconsin, United States, and one of Justin Vernon's current and most notable music projects to date. The band also consists of Mike Noyce, Sean Carey and Matt MacCaughan.

The name 'Bon Iver' (pronounced "bon ee-VAIR") is a play on the French phrase 'bon hiver' meaning 'good winter'. Vernon independently released Bon Iver's debut album For Emma, Forever Ago in 2007, most of which was recorded during a four-month stay in a remote cabin in Wisconsin.

While in high school and college Vernon founded the indie-rock bands Mount Vernon and DeYarmond Edison in Eau Claire, Wisconsin, where he still resides.