|Related terms:||Hogwarts Era|
|See also:||Harry Potter, Houses (Harry Potter), Sorting AU, Hogwarts (wikipedia)|
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The school has four Houses: Gryffindor, Slytherin, Ravenclaw, and Hufflepuff. A popular type of AU is sorting a character into a different House, such as sorting Harry into Slytherin instead of Gryffindor. Online personality tests have always been popular to see which House fans would be sorted into.  Some fans of the series identify with one of the Houses, and don icons on places such as LiveJournal to show affiliation. Identifying with two Houses is also prevalent, and fans have created combined House names such as Slytherdor (Slytherin and Gryffindor) and Ravenpuff or Huffleclaw (Ravenclaw and Hufflepuff).
Hogwarts is a popular AU setting for other fandoms; the characters of another fandom might attend or drop by Hogwarts in crossover or fusion fanfic, or they attended Hogwarts in the past as students. See Hogwarts AU.