Opium is a narcotic analgesic drug.

Opium may also refer to:

• Opium (perfume)
• Opium (band), a UK band formed by Alex Macpherson ex The Wake (Factory Records) ex The Cat Club (Jive Records). Opium record on the Neuropa label.
• Opium (song), the best-known song by Portuguese goth-metal band Moonspell, from their 1996 album Irreligious