When was the final Harry Potter novel published?

The final Harry Potter novel was published on 21 July 2007.

Harry Potter and the Deathly Hallows, the seventh novel by J.K. Rowling, was released in the United Kingdom, the United States, and several other markets on that date. It concludes Harry’s quest to defeat Lord Voldemort and resolve the central conflict introduced in the first book.

The publication was accompanied by unusually intense public interest. Publishers arranged large midnight launch events, and readers queued at bookstores to obtain copies as soon as sales began. The book sold millions of copies immediately after release.

The final novel’s publication date is different from the date of the last film’s release. Harry Potter and the Deathly Hallows was split into two films, released in 2010 and 2011, so the book series ended several years before the screen adaptations did.