Which Hogwarts house did J.K. Rowling assign to herself on Pottermore?

J.K. Rowling assigned herself to Gryffindor on Pottermore.

Pottermore was Rowling’s official digital platform for Harry Potter fans, launched in 2011. It included interactive features such as house sorting, wand selection, writing by Rowling, and material expanding the fictional world.

Gryffindor is one of Hogwarts’ four houses and is associated in the novels with bravery, courage, nerve, and chivalry. Harry Potter, Ron Weasley, and Hermione Granger are also sorted into Gryffindor.

This fact concerns Rowling’s own stated online sorting result, not a character’s house. Hogwarts house assignments belong to the fictional setting, while Rowling’s Pottermore result was part of the fan experience built around that setting.