The third season of the American horror anthology television series American Horror Story, subtitled Coven, is set in 2013 New Orleans and follows a coven of witches descended from Salem as they fight for survival and features flashbacks to the Salem witch trials in 1692, as well as the 1830s, 1910s, 1960s, 1970s, and 1990s. The ensemble cast includes Sarah Paulson, Taissa Farmiga, Frances Conroy, Emma Roberts, Lily Rabe, Evan Peters, Denis O'Hare, Kathy Bates, and Jessica Lange, with all returning from previous seasons, except Roberts and Bates. The season marks the first to not feature cast mainstays Dylan McDermott and Zachary Quinto.

Created by Ryan Murphy and Brad Falchuk for the cable network FX, the series is produced by 20th Century Fox Television. Coven was broadcast between October 9, 2013, to January 29, 2014, consisting of 13 episodes. Like its predecessors, the season was met with both positive reviews and strong ratings, with the premiere attracting a series high of 5.54 million viewers, which, at the time, was the most viewed episode of the series. The season garnered seventeen Primetime Emmy Award nominations, including Outstanding Miniseries. It received nominations for Lange, Paulson, Bassett, Conroy, and Bates at the 66th Primetime Emmy Awards, with Lange and Bates winning their respective categories. In addition, Coven was nominated for Best Miniseries or TV Film at the Golden Globe Awards.

In January 2013, series co-creator Ryan Murphy hinted that a clue about the third season would be hidden in the tenth episode of the second season. In a later interview discussing that episode, he stated, "I sorta feel like for the third version I want to do something that's a little bit more 'evil glamour.' Just something that's a little bit more...one of the things that I missed this season was I really loved having that Romeo and Juliet youth story with Violet and Tate [from the first season]. I want something like that again, and we're doing something like that in the third season. And we're contemplating shooting the show in a different place. We're contemplating shooting it in a place in the country where true horror has been." In another interview, Murphy added that the season would be set in the modern-day.

Executive producer Tim Minear has stated that, while this season's tone might be lighter with more humor, the global themes of it will be "oppression of minorities of all kinds, and within that idea, minority groups going after each other and doing the work of the larger culture." He added, "While there is a strong feminist theme that runs throughout Coven, there are themes of race and themes of oppression, and themes of family – especially mothers and daughters."

In October 2016, Murphy stated that a future season of the show would feature a return/continuation of Coven. He stated that this is not the theme for season 7, but a later season. He also confirmed that Lady Gaga's character from Roanoke is the first Supreme. Later that month, Murphy announced that the season would be a Coven and Murder House crossover continuation. Merging stories, themes, and characters. He also stated that he had begun reaching out to actors from both seasons to reprise their respective roles. In 2018, Murphy announced the eighth season, Apocalypse, which would be the crossover season. Apocalypse follows the world after a nuclear holocaust, and the events leading up to the end of the world, principally, the witches' fight against Michael Langdon, the antichrist who was born in Murder House.

Series executive producers and co-creators Ryan Murphy and Brad Falchuk stated that, as with the second season, "many actors" would return for the third season in different roles. Jessica Lange, Evan Peters, and Sarah Paulson all confirmed their returns. Murphy added that Lange would portray a "real glamour-cat lady", whose name was later revealed to be Fiona Goode. Paulson said in an interview that her character would "definitely [be] different [to her season two character]." She added, "Basically, she's going to look different, and my relationship to Lange is going to be quite different this time. At the beginning of last season, no one knew that Lana would be the hero, so it's possible I could end up the evil one this year. As of right now, there will be some of Lana Winters' qualities in my character, but I don't know for sure." Taissa Farmiga, who played a lead role in the first season, starred as Zoe Benson, a character involved in a prominent romance with Peters' character. Lily Rabe and Frances Conroy portrayed series regulars Misty Day and Myrtle Snow, respectively. Kathy Bates co-starred as Delphine LaLaurie, an evil woman from the past who tortures her slaves. Murphy stated that Bates' character would be "five times worse than [her] Misery character" and is also inspired by a "true event". It was reported on May 22, 2013, that Emma Roberts would co-star as Madison Montgomery, a difficult Hollywood starlet.

In May 2013, Murphy announced via Twitter that Angela Bassett and Patti LuPone had joined the cast. Bassett later confirmed she would be playing voodoo priestess, Marie Laveau. In an interview, LuPone said that her character, Joan Ramsey, would not be a witch but "the personification of the religious right, 'like Piper Laurie in Carrie.'" Gabourey Sidibe appeared in 12 episodes of the season portraying Queenie, a young witch, whose prominent ability allows her to become a human voodoo doll. First season actress Jamie Brewer recurred as Nan, a young witch who is clairvoyant.

In July and August 2013, Murphy announced through Twitter that Murder House actors Denis O'Hare and Alexandra Breckenridge had joined the cast in unknown roles, later known as Spalding and Kaylee, respectively. Also in August, Murphy announced that Christine Ebersole would be playing a "Glinda the Good Witch-type of gal", who is Fiona's predecessor. In an interview, Jessica Lange revealed that Mare Winningham had joined the cast as Peters' character's mother, Alicia Spencer. Leslie Jordan announced that he had joined the cast as Quentin Fleming, a high-ranking witch. In September 2013, Alexander Dreymon was cast in the role of Luke Ramsey. Described as "the handsome young man who moves in next door to the Academy". Danny Huston, Josh Hamilton, and Lance Reddick all recurred throughout the season as the Axeman, Hank Foxx, and Papa Legba, respectively. Murphy also invited singer Stevie Nicks to be a part of the season. She appeared in two episodes, "The Magical Delights of Stevie Nicks" and "The Seven Wonders".