The last book in the main series was "Harry Potter and the Deathly Hallows" which was published in 2007.
However, there are a few additions to the Harry Potter world:
* "Harry Potter and the Cursed Child" is a stage play that serves as a sequel to the series. It was published as a script book in 2016.
* "Fantastic Beasts and Where to Find Them" is a spin-off series of films and books based on a textbook mentioned in the Harry Potter series. The first book was published in 2001.
* "The Tales of Beedle the Bard" is a collection of fairy tales mentioned in "Harry Potter and the Deathly Hallows". It was published in 2008.
So, while there aren't any new Harry Potter books by J.K. Rowling, there are still new stories set in the wizarding world being told.