Harry Potter series:
* Harry Potter and the Philosopher's Stone (1997)
* Harry Potter and the Chamber of Secrets (1998)
* Harry Potter and the Prisoner of Azkaban (1999)
* Harry Potter and the Goblet of Fire (2000)
* Harry Potter and the Order of the Phoenix (2003)
* Harry Potter and the Half-Blood Prince (2005)
* Harry Potter and the Deathly Hallows (2007)
Other books:
* The Casual Vacancy (2012) - a novel for adults
* Fantastic Beasts and Where to Find Them (2001) - a fictional textbook, later adapted into a film series
* Quidditch Through the Ages (2001) - a fictional textbook, later adapted into a film series
* Tales of Beedle the Bard (2008) - a collection of fairy tales
* The Cuckoo's Calling (2013), The Silkworm (2014), Career of Evil (2015) - crime novels written under the pseudonym Robert Galbraith
* The Christmas Pig (2021) - a children's novel
* The Ickabog (2020) - a children's novel released for free online during the pandemic
Please note: There are other short stories, essays, and non-fiction works written by J.K. Rowling, but these are the most notable.