The Sour Tour was the debut concert tour by American singer-songwriter and actress Olivia Rodrigo in support of her debut studio album, Sour (2021). It began on April 5, 2022, in Portland, Oregon, with shows across North America and Europe. It concluded in London on July 7, comprising 49 shows. Gracie Abrams, Holly Humberstone, Chappell Roan, and Baby Queen served as opening acts.

In July 2021, Billboard reported that the singer would be unable to embark on a tour until the following year due to her television commitments and her contract with Disney. An official concert cycle was announced through social media on December 6, with tickets going on sale four days later.

Tickets for the tour went on sale December 10 for fans who were chosen for "Verified Fan" registration. Tickets sold out in minutes, although many attributed this to ticket scalpers, with some tickets being listed on secondhand sites for more than $9,000 within minutes of tickets going on sale. Many fans and media outlets criticized the choosing of smaller venues over arenas, citing it as the reason many fans were unable to secure tickets. Rodrigo defended her decision to perform at smaller venues, telling the Los Angeles Times "I don’t think I should skip any steps" and assuring fans "there will be more tours in the future."

This set list was representative of the show on April 5, 2022, in Portland. It was not representative of all concerts for the duration of the tour.