Red is the fourth studio album by American singer-songwriter Taylor Swift. It was released on October 22, 2012, by Big Machine Records. The album's title refers to the tumultuous, "red" emotions Swift experienced during the album's conception; its songs discuss the complex and conflicting feelings resulting from fading romance.

Hoping to experiment with new sounds beyond her previous albums' country pop style, Swift engaged new producers Dann Huff, Max Martin, Shellback, Jeff Bhasker, Dan Wilson, Jacknife Lee, Butch Walker, alongside her long-time collaborator Nathan Chapman. The record combines styles of pop, country, and rock, with eclectic elements including arena rock, Britrock, dance-pop, and dubstep. Big Machine promoted Red as a country album but many critics disputed this categorization and deemed it a pop record. The album was supported with seven singles, including the US Billboard Hot 100 number-one lead single "We Are Never Ever Getting Back Together" and the Mainstream Top 40 number-one single "I Knew You Were Trouble".

In the US, Red spent seven weeks atop the Billboard 200—making Swift the first female artist and the second act since the Beatles to have three consecutive albums each spend at least six weeks at number one, and was certified seven-times Platinum by the Recording Industry Association of America (RIAA). It topped the charts and received multi-platinum certifications in Australia, Canada, New Zealand, and the United Kingdom. The album received nominations for Album of the Year at the 2013 Country Music Association Awards, and Album of the Year and Best Country Album at the 2014 Grammy Awards. Swift promoted the album with the Red Tour (2013–2014), which grossed $150 million.

Contemporaneous critics praised Swift's songwriting in Red but they were divided on the album's sonic range; praise was directed at the album's versatility but criticism targeted its inconsistency. Retrospectively, many critics regard Red as Swift's best album and a transitional record bridging her country roots to mainstream pop. It appeared in publications' lists of the best albums of the 2010s decade and ranked at number 99 in the 2020 revision of Rolling Stone's 500 Greatest Albums of All Time. Following the 2019 dispute regarding the ownership of Swift's back catalog, she released a re-recording, Red (Taylor's Version), on November 12, 2021.