Treacherous (Taylor Swift song)

"Treacherous" is a song by the American singer-songwriter Taylor Swift, taken from her fourth studio album, Red (2012). Swift wrote the track with its producer Dan Wilson. Blending styles of country and pop, "Treacherous" is a slow-burning ballad that builds up into a finale. Its lyrics are about a narrator's attempt to protect a fragile and dangerous relationship. A demo of the song was included in the tracklist of Red's deluxe edition.

"Treacherous" peaked at number two on the United States's Billboard Bubbling Under Hot 100 and number 65 on the Canadian Hot 100. Swift included the song on the set list of the Red Tour (2013–2014) and performed it on select dates of the Reputation Stadium Tour (2018) and the Eras Tour (2023–2024). Music critics selected it as an album highlight, commending Swift's songwriting and the production. Retrospectively, they have regarded it as one of Swift's better songs.

A re-recorded version, titled "Treacherous (Taylor's Version)", was released as part of Swift's second re-recorded album, Red (Taylor's Version) (2021). It peaked at number 42 on the Billboard Global 200 and entered on national charts in Australia, Canada, Singapore, and the US.