The Ministry of Magic (M.o.M.) is the governing body for the magical community of Britain. The Ministry connects the British Government to the wizarding world. Its headquarters is in central London, deep underground. It is headed by the Minister for Magic. The current Minister in Britain is Kingsley Shacklebolt. It is known that other countries have their own Ministries of Magic, such as Norway.

The Leaky Cauldron is a popular Wizarding pub in London. It is the entrance to Diagon Alley, and, indirectly Knockturn Alley. For much of the end of the 20th Century, Tom was the landlord. At some point, Hannah Abbott becomes the landlady, moving in with her husband, Neville Longbottom. It was built by Daisy Dodderidge whom was the first landlady of the Leaky Cauldron. The Leaky Cauldron was built in 1500. She says it is, "to serve as a gateway between the non-wizarding world and Diagon Alley." It rents rooms, has a bar, several private parlour rooms, and a large dining room. To Muggles, the pub appears to be a broken-down old shop front on Charing Cross Road. The rear of the pub, however, opens up onto a chilly courtyard and the entrance to Diagon Alley. To gain access, a witch or wizard taps the bricks in the wall in a counter-clockwise order. A doorway to Diagon Alley then forms which then re-arranges back to the original wall after the person(s) walk through.

Knockturn Alley is a shopping area off Diagon Alley in London. It is filled with shops devoted to the Dark Arts, including Borgin and Burkes, which specializes in objects that have curious and strong magical properties. When Tom Riddle graduated from Hogwarts he worked at Borgin and Burkes.

King's Cross Station is considered one of the main train stations to serve London, England. Students of Hogwarts School of Witchcraft and Wizardry take the scarlet steam engine named the Hogwarts Express to Hogwarts from Platform 9¾ on September the first at eleven o'clock sharp. It also serves as a major intercity and commuter rail hub for Muggles going to North London, or Yorkshire and the North East and Scotland.

Gringotts Wizarding Bank is the only known bank of the wizarding world, and is owned and operated by Goblins. It was created by the goblin Gringott. Its British branch is located in Diagon Alley in London, England. In addition to storing money and valuables for wizards and witches, one can go there to exchange Muggle money for wizarding money. According to Rubeus Hagrid, other than Hogwarts School of Witchcraft and Wizardry, Gringotts is the safest place in the wizarding world.