What is the title of the final Harry Potter novel?

The final Harry Potter novel is Harry Potter and the Deathly Hallows.

Published on 21 July 2007, it is the seventh and concluding book in J.K. Rowling’s main Harry Potter series. The story follows Harry, Ron, and Hermione as they search for Horcruxes while Voldemort’s control over the wizarding world intensifies. Its title refers to three legendary magical objects: the Elder Wand, the Resurrection Stone, and the Cloak of Invisibility.

The novel was released simultaneously in many markets and set major sales records. It is distinct from Harry Potter and the Half-Blood Prince, the sixth book, and from the later stage play Harry Potter and the Cursed Child.