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 track-list 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. The track has been performed on three of Swift's concert tours, including the Red Tour (2013–2014), where it was included on the regular set list. Critics who picked the song an album highlight praised 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.