The Boys' Dormitories

• Type: Residence (Dormitory)
• Location: Within the Common Rooms of each of the four Houses in Hogwarts Castle.
• Owner/Residents: Male students of Hogwarts School of Witchcraft and Wizardry, organized by House and year group.
• Key Features: Multi-bed sleeping quarters, typically circular rooms, four-poster beds with house-specific decorations, staircase access from the Common Room.

The boys' dormitories at Hogwarts are the sleeping quarters for male students, with each of the four Houses having its own set. These dormitories are accessed via a staircase leading up from the respective House's Common Room. The dormitories are divided by year; for example, all first-year Gryffindor boys share one room, second-years share another, and so on up to the seventh years. The most detailed description provided in the novels is of the Gryffindor boys' dormitory. It is a circular room located in Gryffindor Tower, furnished with five four-poster beds, each with deep-red velvet curtains. The room is kept warm by a stove and has a tall, thin window that looks out over the Hogwarts grounds. The space is often untidy, reflecting the lives of its inhabitants, with belongings such as Quidditch posters, spellbooks, and sweet wrappers scattered about. The occupants of Harry Potter's dormitory throughout his time at Hogwarts were Ron Weasley, Neville Longbottom, Seamus Finnigan, and Dean Thomas. A significant feature of the dormitories is the magical security placed upon them by the Hogwarts Founders. The staircase leading to the girls' dormitory is enchanted to prevent boys from accessing it; should a boy attempt to climb the stairs, they transform into a long, smooth slide, ejecting him. However, no such enchantment exists on the boys' dormitory staircase. Hermione Granger notes this is due to the founders' old-fashioned belief that girls were more trustworthy than boys.

The boys' dormitories, particularly the Gryffindor one, serve as a private sanctuary and a setting for many key character moments and plot developments throughout the series.

• In Harry Potter and the Philosopher's Stone, the dormitory is where Harry Potter experiences his first night at Hogwarts, feels a sense of belonging, and later receives the Invisibility Cloak as an anonymous Christmas gift.
• In Harry Potter and the Chamber of Secrets, Dobby the House-Elf appears in the dormitory to warn Harry about the dangers at school, performing magic that nearly gets Harry expelled.
• In Harry Potter and the Prisoner of Azkaban, the dormitory becomes a scene of high tension when Sirius Black manages to break in, standing over Ron Weasley's bed and slashing the curtains with a knife.
• In Harry Potter and the Goblet of Fire, it is the setting for the fallout between Harry and Ron after Harry is chosen as a Triwizard Champion. Later, Dobby awakens Harry in the dormitory to give him Gillyweed for the Second Task.
• In Harry Potter and the Order of the Phoenix, the dormitory is where Harry's feud with Seamus Finnigan erupts over the Daily Prophet's smearing of Harry and Albus Dumbledore. It is also where Harry often suffers from his painful connection to Lord Voldemort, experiencing the Dark Lord's thoughts and emotions.
• In Harry Potter and the Half-Blood Prince, the dormitory is the scene of Ron's accidental poisoning after he eats Chocolate Cauldrons spiked with a Love Potion. Harry saves his life using a bezoar, an antidote he learned about from the Half-Blood Prince's textbook, which he keeps hidden in his trunk in the room.

• Gryffindor Boys' Dormitory: Located in Gryffindor Tower. A circular room with five four-poster beds draped in red velvet. Its known occupants are Harry Potter, Ron Weasley, Neville Longbottom, Seamus Finnigan, and Dean Thomas.
• Slytherin Boys' Dormitory: Located within the Slytherin Dungeon. While not described in detail, it is home to Draco Malfoy, Vincent Crabbe, Gregory Goyle, Blaise Zabini, and Theodore Nott.
• Ravenclaw Boys' Dormitory: Located within Ravenclaw Tower. The specific layout and appearance are unknown.
• Hufflepuff Boys' Dormitory: Located in the Hufflepuff Basement, near the kitchens. The specific layout and appearance are unknown.

In the film adaptations, the Gryffindor boys' dormitory is one of the most consistently featured sets. The set designers made a conscious effort to have the room evolve with the characters. In the early films, the room is simpler, but as the series progresses, the personal effects around each boy's bed become more distinct, reflecting their individual personalities and interests. For example, Dean Thomas's area is shown with a West Ham United poster, and Ron's is decorated with Chudley Cannons memorabilia. (film)