Bivouac may refer to:

• Bivouac shelter, an encampment
• Bivouac sack, or "bivy sack" or bivy bag, an extremely lightweight alternative to traditional tent systems
• A military camp
• Bivouac (ants), where a nest is constructed out of the living ant worker's own bodies
• Bivouac (band), a UK indie rock band of the 1990s
• Bivouac (album), a 1992 album by the punk band Jawbreaker
• Happy Bivouac, a song and the album named after it by the Japanese band The Pillows