It’s usually the job of the sorting hat test to decide who goes into which house. There are four houses in the Harry Potter Wizarding World – Gryffindor, Hufflepuff, Ravenclaw and Slytherin. What Hogwarts House is Billie Eilish in?.What Hogwarts House would JK Rowling be in?.Which house in Harry Potter is the nicest?.Was Hermione supposed to be a Ravenclaw?.If you are a true Harry Potter Fan then you will surely have all this Merch, check it out here to be sure! Table of Contents Think you know what house you belong to? The results may surprise you! Take our Harry Potter House Quiz below and see for yourself! Over 10,000 have already taken it! Click “start” on the quiz below and find which house you are in now!