Which magical object chooses a student’s Hogwarts house in J.K. Rowling’s novels?

The Sorting Hat chooses a student’s Hogwarts house in J.K. Rowling’s novels. During the Sorting Ceremony, each new student places the enchanted hat on their head, and it announces whether they belong in Gryffindor, Slytherin, Ravenclaw, or Hufflepuff.

The hat is described as belonging originally to Godric Gryffindor, one of Hogwarts’ four founders. It contains the founders’ intelligence and can assess a student’s personality, abilities, and preferences. Its decisions are not always simple: Harry’s sorting scene shows that the hat considered placing him in Slytherin before accepting his preference for Gryffindor.

The Sorting Hat is different from objects with other magical functions. The Mirror of Erised shows a person’s deepest desire, the Marauder’s Map reveals Hogwarts’ layout and occupants, and the Elder Wand is one of the Deathly Hallows. The hat’s specific role is house assignment.