The Slytherin common room is a long, low-ceilinged, dungeon-like room filled with skulls and the like. There are high-backed chairs and a carved mantlepiece on the fireplace. The walls are rough stone. The light is green from the green hanging lamps and because it's located under the lake.

Moderators: Headmaster, Professor Snape, Draco Malfoy, Pansy Parkinson