“Cardigan” (stylized in all lowercase) is a song recorded by American singer-songwriter Taylor Swift for her eighth studio album, Folklore (2020). It was serviced by Republic Records to radio stations on July 27, 2020 as the lead single from the album. The song was written by Swift and Aaron Dessner and produced by the latter. “Cardigan” is a moody, slow-burning, folk and soft rock ballad that sees Swift singing about a romance lost in memories, over stripped-down instrumentals consisting of a tender piano and a clopping drum sample.

Upon release, “Cardigan” received widespread acclaim from music critics, who praised the vivid songwriting and the laid-back arrangement. The song debuted at number one on the global Spotify songs chart, receiving over 7.742 million streams.