Religious debates over the Harry Potter series of books by J. K. Rowling are based on claims that the novels contain occult or Satanic subtexts. A number of Protestant, Catholic, and Eastern Orthodox Christians have argued against the series, as have some Muslims.

The Harry Potter series has faced bans and challenges in various countries and school districts primarily due to religious and moral concerns. Critics, particularly from conservative Christian and Islamic backgrounds, argue that the books promote witchcraft, sorcery, and the occult, which they believe contradicts religious teachings and could lead children toward "satanic" influences. In countries like the United Arab Emirates, the books were famously banned from private schools in the early 2000s for containing elements that conflicted with Islamic values. In the United States, it has been one of the most challenged series in libraries, with some parents claiming it encourages "disobedience to authority" and uses "nefarious means" to achieve goals. However, in 2026, many of these formal bans have been lifted or softened, as the series is now widely recognized for its themes of love, bravery, and the triumph of good over evil. Despite this, the books still face occasional localized censorship in private or religious institutions that maintain strict views on supernatural content.