"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.

Red is the fourth studio album by the American singer-songwriter Taylor Swift, released on October 22, 2012, by Big Machine Records. The title is the color to which Swift associated the tumultuous emotions she was experiencing from lost love while conceiving the album.