Obsession may refer to:
- The Obsession, another name for the trope Devoted to You.
- Obsession Song, a musical trope about songs performed by mad lovers.
- Obsession, a 1976 Psychological Thriller film directed by Brian De Palma.
- Obsession, a 2006 Pokémon fanfiction written by Blackjack Gabbiani.
- Obsession, a 2016 Transformers: Prime fanfiction written by ChaoticReverie
- The Obsession, a 2021 Young Adult novel written by Jesse Q. Sutanto.
- Obsession, a 2026 Horror film written and directed by Curry Barker.