At which London station would you catch the Hogwarts Express?

The Hogwarts Express, the magical train transporting students to Hogwarts School of Witchcraft and Wizardry, departs from King's Cross Station. This iconic location is integral to the Harry Potter series, specifically where Platform 9¾ is located, hidden from the non-magical world. Fans of the series often visit this platform in real life, which has become a symbol of the franchise.

The other stations listed do not have any connection to the Hogwarts Express within the context of the stories. Victoria Station, Waterloo Station, and Paddington Station serve various other train routes and are well-known stations in London but do not feature in the Harry Potter narrative as the departure point for the magical train. Hence, King's Cross is the only correct answer, linking it directly to the beloved storyline in the series.