What is the name of J.K. Rowling’s wizarding-school train station platform?

J.K. Rowling’s wizarding-school train station platform is Platform Nine and Three-Quarters.

In the Harry Potter books, students reach the Hogwarts Express at the hidden platform in London’s King’s Cross Station. They enter it by passing through the barrier between platforms 9 and 10, then board the train for the journey to Hogwarts.

The unusual fraction in the name is a memorable example of Rowling’s fictional world intersecting with a real location. King’s Cross Station exists in London, but Platform 9¾ is imaginary. The books’ descriptions and the films’ visual treatment made the platform one of the series’ most recognizable settings.

King’s Cross later installed a platform-themed photo spot and shop for visitors. A common mistake is calling it “Platform Nine and a Half”; the canonical name is Nine and Three-Quarters. The fraction is written as 9¾ in many signs and fan references.