15 Of 2021's Most Interesting 'Harry Potter' Fan Theories

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Vote up 2021's most interesting 'Harry Potter' fan theories.

With 2021 nearly gone, it's high time to revisit some of this year's most intriguing fan theories about the Harry Potter franchise. Some are darker than expected, some reveal the inner workings of the wizarding world that haven't been considered before, and others we feel silly for not thinking about sooner.

No matter the subject within the world of Harry Potter, all are touched with magic and should be explored! Vote up your favorites!


  • 1
    516 VOTES

    Wizards Enslaved The House Elves Because They Were Threatened By Them

    Wizards Enslaved The House Elves Because They Were Threatened By Them
    Photo: Harry Potter and the Chamber of Secrets / Warner Bros. Pictures

    From Redditor u/Deus-system-failed:

    We know that House Elves are immune to magical restrictions, like the apparation barrier and the fact that they can create something from nothing. They also don't seem to need wands or even learn magic to know it, as they can do non-verbal and permanent magic without learning. I think that wizards knew that Elves were magically superior and saw them as a threat, so they enslaved them by taking advantage of their kindness. I think the House Elves were tricked into making a permanent magical contract with wizards - to be enslaved for all generations - so they wouldn't be able to rally against wizards. 

    516 votes
  • 2
    368 VOTES

    Wizards Are At Risk Of Going Extinct

    Wizards Are At Risk Of Going Extinct
    Photo: Harry Potter and the Deathly Hallows - Part 2 / Warner Bros. Pictures

    From Redditor u/EquivalentInflation:

    Hogwarts seems to have the total circumference of a decently sized college, with space for about 5-10 thousand students. However, Hogwarts has nowhere that number of students. 

    Which begs the questions, why would the founders of Hogwarts build a massive amount of unused space? The logical conclusion is that they didn't, they needed the space during their time. Doing the math, there would be about 100,000 wizards alive during that time. 

    We can see that over the course of a millennia, 90% of the wizarding population of the UK disappeared. Ron even says that, "If we hadn't intermarried with muggles, we would've died out." When the wizarding world went underground, it was after a series of witch hunts. Then, living in secrecy all of the sudden made it difficult for wizards and witches to meet and marry. By the time marrying muggles was accepted, it's likely the wizarding community diminished greatly - with many dying during WWII as well. 

    Then, with all the deaths from the final battle with Voldemort, along with the anti-muggleborn sentiment that would still linger, it's likely that the birth rate went down again.  

    368 votes
  • Voldemort Could Not Have Sensed Snape and Narcissa's Lies Since They Were Rooted In Love
    Photo: Harry Potter and the Deathly Hallows - Part 2 / Warner Bros. Pictures

    From Redditor u/Riddlers_Razor:

    Firstly, let us imagine that the act of mind-reading is similar to walking through a series of corridors in a person's mind, where the doors open to the memories and desires within. It has been stated many times that both characters, Snape and Narcissa, lied out of love. Snape was a double agent due to his love for Lily and Narcissa lied about Harry's death due to her love of Draco. It has also been stated many times that Tom Riddle was conceived out of a loveless union between Tom Riddle Sr. and Merope Gaunt [through the use of a love potion], thus he has no concept or knowledge of, or appreciation for love. 

    Going back to the image of mind reading as walking through doorways in the mind, image a trip through Snape's. We see a door that opens onto Snape's troubled childhood, then another of him getting sorted into Slytherin, but then there is a door with his memories of Lily Potter. Due to his inability to grasp the concept of love, Voldemort would not be able to perceive the door. Likewise for Narcissa, and her door for Draco. 

    318 votes
  • Dumbledore Needed Sirius Black To Go To Azkaban After The Death Of The Potters
    Photo: Harry Potter and the Prisoner of Azkaban / Warner Bros. Pictures

    From a Redditor:

    I know Dumbledore didn't know about the last minute switch between Peter and Sirius, but Dumbledore is a skilled legilimens and could've easily read Sirius' mind, found out he was innocent, and use his word to have Sirius go free (as Snape did). Also, Dumbledore has a lot of influence in Wizarding politics, so this would explain why Sirius was sent to Azkaban without a trial, so that he had no chance of trying to prove his innocence, since Death Eaters who committed equally horrible crimes were given a trial. 

    But why would Dumbledore go out of his way to ensure that one of his loyal order members would be thrown in Azkaban?

    Because, if Sirius was cleared, he would have taken legal guardianship of Harry and Harry needed to go to the Dursleys because Petunia was a blood relative of Lily. Thus, as long as Harry called the Dursleys house "home" the protection of Lily would live on because of Petunia, so he would be safe. 

    422 votes
  • 5
    337 VOTES

    Dumbledore Encouraged Harry's Friendship With Ron And Hermione To Help Harry Grow And Keep Him Out Of The Dark

    Dumbledore Encouraged Harry's Friendship With Ron And Hermione To Help Harry Grow And Keep Him Out Of The Dark
    Photo: Harry Potter and the Half Blood Prince / Warner Bros. Pictures

    From Redditor u/CollectandRun:

    Keep in mind that Dumbledore sends Harry with Hagrid to platform 9 3/4 and they arrive late. The Weasleys are traditionally late to this experience, [then Hagrid leaves Harry] and Harry doesn't know where the platform is - meaning Ron had the best shot of sitting with Harry on the train to Hogwarts [after helping him]. 

    The puzzles at the end of Book 1 were also obviously made for Ron and Hermione specifically, both not only required their special suit of skills, but also needed bravery and loyalty. 

    Dumbledore also promotes Ron and Hermione to prefects, calls them out for house points during the final feast, and leaves them in his will. His affection for Ron and Hermione seems to suggest he owes them something. 

    [In a way, he does] since Ron and Hermione brought a fatherly and motherly love that Harry never had. Ron teaches him how to socialize, play games, and make light on dark topics. Hermione keeps him up to date on what he must learn, helps him deal with complex problems, and worries about him. 

    They nag each other, often over what Harry should do. They save him at various points and help him from reaching a darkness that any orphan dealing with trauma might go through - the same kind that tormented Tom Riddle. 

    337 votes
  • Ginny Weasley Was The First Member Of Dumbledore's Army To Kill A Death Eater
    Photo: Harry Potter and the Deathly Hallows - Part 2 / Warner Bros. Pictures

    From Redditor u/LaGrangianMethod:

    In the Department of Mysteries we see Ginny hit a Death Eater who is flying toward her with a spell - that spell was seen to completly disintegrate a mannequin [earlier in the movie]. I'm pretty sure this is the first Death Eater kill made by one of the kids (excluding Quirrell). 

    294 votes