Demon Slayer: Kimetsu no Yaiba is a Japanese anime television series based on Koyoharu Gotouge's manga series of the same name. The anime series adaptation by Ufotable was announced in Weekly Shōnen Jump in June 2018. The series aired from April 6 to September 28, 2019, on Tokyo MX, GTV, GYT, and BS11. Directed by Haruo Sotozaki, the anime is written by various Ufotable staff members and produced by Hikaru Kondo. The series' characters are designed by Akira Matsushima. The anime's music is composed by Yuki Kajiura and Go Shiina.

The series is licensed by Aniplex of America and streamed on Crunchyroll, Hulu and Netflix. AnimeLab is simulcasting the series in Australia and New Zealand. The first season contains 26 episodes, adapting the first volume to the first chapters of the seventh.

Prior to airing, the first five episodes screened theatrically in Japan for two weeks from March 29, 2019, under the title Kimetsu no Yaiba: Kyōdai no Kizuna (鬼滅の刃 兄妹の絆). Aniplex screened the film at the Aratani Theatre in Los Angeles on March 31, 2019. Madman Entertainment through AnimeLab screened the film in select theaters in Australia on April 2, 2019. In July 2019, it was announced that the series' English dub would air on Adult Swim's Toonami programming block; the dub would premiere on October 13 of that same year.

A sequel film, entitled Demon Slayer: Kimetsu no Yaiba – The Movie: Mugen Train, premiered in Japan on October 16, 2020, with the staff and cast reprising their roles.

A second season, covering the "Entertainment District" arc, was announced on February 14, 2021, with the staff and cast from the first season and film returning. Sotozaki returned as director, with character designs by Matsushima and animation by Ufotable. In September 2021, it was announced that the second season would air for two cours. On September 25, following the Fuji Television broadcast of Mugen Train, it was announced that the "Entertainment District" arc would premiere on December 5, and be preceded by a television series recompilation of the "Mugen Train" arc as featured in the film that premiered on October 10, 2021.

At the end of the second season finale, it was announced that a third season, covering the "Swordsmith Village" arc, was in production. It premiered on April 9, 2023, with a one-hour special, and ended on June 18 of that same year with a 70-minute special.

A fourth season, covering the "Hashira Training" arc, was announced following the end of the third season finale. It premiered on May 12, 2024, with a one-hour episode. The season ended with a 60-minute episode, which aired on June 30 of the same year.

Following the finale of Hashira Training Arc, it was announced that the manga's "Infinity Castle" arc will be adapted into a film trilogy. Crunchyroll will exclusively release the films in theaters globally; it is set to premiere in Japan on July 18, 2025.