Slytherin

Slytherin is one of the four Houses at Hogwarts, and is traditionally home to students who exhibit such traits as cunning and ambition. Founded by Salazar Slytherin, the house tends to contain pure-blood students, due to its founder's contempt for Muggle-born witches and wizards. Most Dark witches and wizards came from this House, most notoriously Lord Voldemort.

Slytherin's head of house for Harry's first six years of school was Severus Snape; however, as he fled with the Death Eaters at the end of Harry Potter and the Half-Blood Prince, it is presumed that Potions teacher Horace Slughorn will become the head of Slytherin House. The Slytherin common room may be found in the dungeons of Hogwarts castle, and are located underneath the lake in the school grounds.

Slytherin, along with Gryffindor, is one of the best and most competitive houses at Quidditch and is often in the lead for the House Cup, having won six times in a row, prior to Harry Potter arriving at Hogwarts.

List of known Slytherins

 * The Black family (with the exception of Sirius Black)
 * Miles Bletchley
 * Millicent Bulstrode
 * Vincent Crabbe
 * Marcus Flint
 * Gregory Goyle
 * Daphne Greengrass
 * Bellatrix Lestrange
 * Draco Malfoy
 * Lucius Malfoy
 * Narcissa Malfoy
 * Montague
 * Theodore Nott
 * Pansy Parkinson
 * Adrian Pucey
 * Tom Riddle/Lord Voldemort
 * Horace Slughorn
 * Severus Snape
 * Andromeda Tonks
 * Cassius Warrington