The Hogwarts train platform in J.K. Rowling’s Harry Potter novels is Platform 9¾.
The platform is located at the fictional magical departure point within London’s King’s Cross station. Students reach it by passing through the barrier between platforms 9 and 10, then board the Hogwarts Express for the journey to school. The train usually departs on 1 September, the start of the Hogwarts academic year.
Platform 9¾ is a fictional location, but its popularity has had a real-world effect. King’s Cross station created a Platform 9¾ sign and luggage-trolley photo opportunity for visitors. The attraction became one of the best-known physical landmarks associated with the film and book series.
Readers sometimes confuse the platform with a conventional numbered platform. The fraction is part of the magical conceit: the entrance lies between ordinary railway platforms rather than being openly accessible to Muggle passengers.