Which Hogwarts house does J.K. Rowling's website identify as her house?

J.K. Rowling's website identifies Gryffindor as her Hogwarts house.

Gryffindor is one of the four houses at Hogwarts School of Witchcraft and Wizardry in the Harry Potter series. It was founded by Godric Gryffindor and is traditionally associated with courage, bravery, nerve, and chivalry.

Harry Potter, Ron Weasley, and Hermione Granger are among the best-known Gryffindor students. The house's colors are scarlet and gold, and its emblem is a lion. Students are assigned to houses by the Sorting Hat when they begin at Hogwarts.

Rowling's identification with Gryffindor is a biographical website detail rather than a plot event in the novels. It should not be confused with the houses assigned to fictional characters, which are part of the story's magical-school system.