J.K. Rowling belongs to Gryffindor in the sorting associated with the Harry Potter website.
Gryffindor is one of Hogwarts School of Witchcraft and Wizardry’s four houses. The house was founded by Godric Gryffindor and is traditionally associated with courage, bravery, nerve, and chivalry. Harry Potter, Ron Weasley, and Hermione Granger are also Gryffindors.
The author has discussed her personal sorting in connection with the official interactive Harry Potter website, Pottermore, later known as Wizarding World. This is a writer’s public association with a fictional house, not a claim that Rowling attended a real magical school.
The other three houses are Ravenclaw, Hufflepuff, and Slytherin. In the novels, the Sorting Hat assigns students to houses, but the stories also emphasize that choices and personal qualities matter more than a label alone.