Opus One

Opus One may refer to:

• "Opus No. 1", a tune by Sy Oliver and Sid Garris
• "Opus Number One", a composition known for its use as music on hold
• Opus 1 (album), by Yugoslav progressive rock band Opus
• Opus One Winery, United States
• An alternative title for the 1971 demo versions of Mike Oldfield's 1973 album, Tubular Bells

• Op. 1, musical compositions assigned number 1
• Opus number, numbers assigned to musical compositions