Harry Potter and The Avengers are definitely two of the most popular and iconic properties of the last decade. Any potential crossover of these two fandoms is an exciting thought to ponder.
The Avengers are a diverse group of heroes with dramatically juxtaposing personality traits. The MCU has utilized this well, presenting various conflicts between the group. If the Avengers attended Hogwarts, then, the Sorting Hat would have immediately picked up on the fundamental differences between them. And though Gryffindor may be Hogwarts' bravest and boldest house, not all heroes belong there.
Updated by Amanda Bruce on September 20, 2021: As more heroes join the Avengers, the fandom can see just how different their styles of heroics are in the MCU. All of the team members are motivated to work for the common good for their own reasons, and they approach the work accordingly. Wanda Maximoff, for example, decides to use her abilities to help people after initially putting her home in danger. Doctor Strange first learns his skills for selfish reasons but discovers a duty to protect reality. Peter Parker just wants to make a difference in his neighborhood. It's these varying approaches that allow the fans to pick out which Avengers Hogwarts houses the heroes would belong to.
Wanda Maximoff (Scarlet Witch): Gryffindor
Though Wanda Maximoff has some of that Slytherin cunning in her — her final battle with Agatha Harkness in WandaVision certainly shows that well — Slytherin is likely her secondary house. At her core, Wanda is very much a Gryffindor.
Even though Wanda is thought of as one of the bravest Avengers, Gryffindors tend to be led by their emotions. They jump into action without thinking, and they have very strong feelings about right and wrong. That can lead to trouble for Wanda, as she causes a huge loss of life without understanding the full extent of her power in Captain America: Civil War. Many of the other heroes understand her, though, as Gryffindor is certainly a house that contains many Marvel heroes.
Bucky Barnes (Winter Soldier): Hufflepuff
Hufflepuff might seem like a surprising sort for the often surly Bucky Barnes. He exhibits Gryffindor bravery, Slytherin cunning, and even Ravenclaw thinking outside the box. With that combination of traits, he's become one of the best anti-heroes of the Marvel Cinematic Universe.
Bucky is, however, a great example of a Hufflepuff. He joins the army as a young man with immense loyalty for his country and other soldiers. After all the trauma he experiences as the Winter Soldier, he still decides to use his abilities to help others, staying in Louisiana with Sam Wilson and helping him train to become the next Captain America. Bucky is all about loyalty, even if he doesn't want to show it.
Sam Wilson (Falcon/Captain America): Gryffindor
Given how quick Sam Wilson is to make friends, join the Avengers, and give Steve Rogers and Natasha Romanoff his support, he might seem like a Hufflepuff as well. However, Sam is a bit more impulsive than someone like Bucky Barnes, a bit more likely to follow his emotions into battle, which is right in line with the Gryffindor approach to life.
Sam takes Steve and Natasha into his home, breaks into a government facility with them, and goes up against a corrupt organization without so much as batting an eye. Sam is also willing to turn around and protect Bucky — the same person he fought for Steve and Natasha — very quickly. He is someone who wants to do the right thing at all times.
Nebula: Slytherin
When the audience first meets Nebula, she's a villain. Raised (and manipulated) by Thanos, she's an intergalactic assassin. She's also someone who craves the connection of family and tries to uphold what she considers the "traditions" of that family, much like Slytherins place high importance on their family history.
However, Nebula also demonstrates great cunning and resourcefulness, no matter what dire situations she's placed in. It's there that her Slytherin nature and strong sense of self-preservation emerges. She's able to detach cyborg limbs and abandon them to keep going or double-cross the villain wanting her to work for them.
Scott Lang (Ant-Man): Ravenclaw
Scott Lang is an outside-the-box thinker. Creativity means he can build his daughter a full obstacle course and treasure hunt for ants throughout his entire house to keep her entertained. That kind of thinking leans him toward Ravenclaw.
Scott's skill with technology solidifies him as a Ravenclaw. He is excellent at understanding security systems and computer networks, which is why he's a great thief, but also why he's able to be just as analytical as he is creative.
James Rhodes (War Machine): Gryffindor
His loyalty to his best friend Tony, and his incredible work ethic, might make some fans think Rhodey belongs in Hufflepuff. He does, however, have that Gryffindor tendency to follow his emotions into battle and wear his heart on his sleeve.
Rhodey could have walked away from the fight (as an Avenger) in Captain America: Civil War. He could have maintained his distance and kept up with the situation as a member of the military. Instead, he rushed in alongside Tony to make War Machine Iron Man's second-in-command. In his earlier appearances in the MCU, Rhodey also outright took Iron Man prototype armor from Tony's house to make it his own, believing he was doing the right thing. Like Sam and Wanda, he follows his heart right into the Gryffindor common room.
Hope Van Dyne (Wasp): Ravenclaw
Loyalty to her family and her ability to con the company executives around her in Ant-Man certainly make Slytherin Hope's secondary house. But like her partner, her destined house is Ravenclaw.
Hope has a great capacity for learning and a strong commitment to understanding everything about being a hero. Not only does she quickly master using the wings on her Wasp suit, but she does so after already understanding everything about using the Ant-Man technology. It's Hope who coaches Scott to understand it, and it's also Hope who is often able to come up with solutions to their problems in the field, making her one of the most underrated heroes in the MCU. Hope wants to know the ins and outs of every aspect of being the Wasp so that she can make a difference, and that's where she lines up as a Ravenclaw.
Stephen Strange (Doctor Strange): Slytherin
When Stephen Strange loses the use of his hands, he doesn't just think his career might be over; he goes to great lengths to make sure his greatest ambitions can still come to pass. Though he does a lot of good for the world, it's his own ambition that fuels him, and that's what makes him a Slytherin.
Strange puts in the work to learn about sorcery, but he does it in a cunning way. He takes shortcuts, using meditation and the Time Stone, to make sure he can learn things even faster. Strange puts his own deadline on his work, and when in the field with others, he never fully explains himself. Instead, he keeps his explanations to the other Avengers vague enough that they'll need to rely on him for help, keeping himself in the game. That's a very Slytherin move.
Rocket Raccoon: Ravenclaw
With his penchant for crime and his love for tricking people, Slytherin makes a good secondary house for Rocket. His primary house might be a surprise for some, though: Ravenclaw.
Rocket is surprisingly creative and very much a planner. Even when he first teams up with the future Guardians of the Galaxy to break out of prison, he's the one who comes up with their plan. Peter Quill might seem like the Guardians' leader, but it's Rocket who finds several seemingly disconnected pieces and puts them together in the form of a plan. He does this in all of his interactions with the group, even helping Thor pull off forging a new weapon for himself in the heart of a star during the events of Avengers: Infinity War.
Okoye: Hufflepuff
There's no denying that Okoye is one of the bravest of the heroes in the MCU. She joins up with what's left of the Avengers during the time skip in Avengers: Endgame to help protect the planet, not just Wakanda. She is also frequently willing to put herself in the line of fire so that someone else can live; even the alternate timeline version of her in Marvel's What If...? episode 5 makes that clear.
All of that bravery, however, comes from a place of immense loyalty. Okoye makes it clear in Black Panther that her loyalty is first and foremost to Wakanda, and the same is true in What If...? She protects the country and the throne while the royal family tries to find a way to help T'Challa. She goes out into the world during a zombie outbreak in What If...? to find the missing king. Okoye is the epitome of a loyal Hufflepuff.
Bruce Banner (Hulk): Ravenclaw
Bruce Banner might turn into a large, strong Hulk, but he himself is a rather soft, intellectual man. He is an extremely talented scientist and all about the pursuit of knowledge, making him a Ravenclaw.
Banner also has some Hufflepuff characteristics, however, being a kind, gentle soul deep down. Overall, though, since his intellect is such a defining character trait, Ravenclaw is definitely the house for him. It's certainly where he would thrive. He is, after all, the person who grew a synthetic being with Tony just to see if the two of them could before he worried about the consequences.
Natasha Romanoff (Black Widow): Slytherin
Slytherin gets a bad rap, but having Slytherin traits is not a bad thing. Natasha Romanoff is a talented spy and has many Slytherin characteristics such as being cunning, clever, and self-preserving. She also is loyal to the people in her circle, which is also a Slytherin trait.
While her secondary house is likely Ravenclaw, Natasha would make a great addition to Slytherin. She doesn't use her Slytherin traits selfishly but for the greater good. Natasha often tricks villains into giving her the exact information she needs to save the day, whether that's Loki or the Red Room leader Dreykov.
T'Challa (Black Panther): Gryffindor
T’Challa is a character that is a bit hard to place because he’s a very balanced person. He has a sweet, soft, dorky side that makes sense for Hufflepuff, but is also powerful, clever, and cunning, making him a little Slytherin-like. Overall, however, it seems that T’Challa is a true Gryffindor.
He is extremely brave, for one thing. He is also daring and full of courage, all about taking care of his people and trying to do the right thing. T’Challa definitely embodies all of the best traits of Gryffindor house. If he’d attended Hogwarts, he'd probably have been Head Boy to boot.
Peter Parker (Spider-Man): Hufflepuff
Spider-Man is another character who has two main options for his primary house. He is obviously very smart and inventive, which are Ravenclaw traits. However, he seems to be a better fit for Hufflepuff. Members of this house are defined by their hard-working, dedicated, and fair natures. They also often have a soft side, something else that Spider-Man possesses in spades.
In the MCU, Peter Parker is a big sweetheart, and he also works hard to be a hero, never letting anything get in the way of his doing the right thing. His big heart and desire to save others make him a Hufflepuff for sure.
Clint Barton (Hawkeye): Hufflepuff
Hawkeye is another character who belongs in Hufflepuff, which shows that people from the same house can still have very different personalities.
Hufflepuff is an inclusive house, perfect for those individuals who don’t have strong characteristics of the other houses. While Hawkeye is brave and intelligent, he doesn’t really fit well as a Gryffindor or a Ravenclaw. His hard-working tendencies (particularly in light of the fact that he has to be extra skilled as a normal human to keep up with superheroes) place him firmly in Hufflepuff. He’s also a character who seems to take a balanced, fair approach to life.
Vision: Ravenclaw
Vision is a character that is mostly about intellect. Seeing as he was partially made from the Jarvis AI, Vision’s foundation as a being is all about knowledge and wisdom. He was also literally brought to life with the Mind Stone, so everything about him is centered around the mind and learning.
It’s hard to imagine Vision fitting into any other house than Ravenclaw. His character in the MCU is mostly about intelligence, much like Bruce Banner. As a result, Vision would also excel in the company of his fellow intellectuals.
Thor: Gryffindor
Thor is one of the most Gryffindor-like Avengers of all. This is the person who forged a weapon in the heart of a star. He exemplifies basically every trait that Gryffindors are known for. He is extremely brave and daring (sometimes to the point of being quite reckless). These are all defining personality components among Gryffindors.
Thor is also very courageous and chivalrous, always committed to saving the day (even if he has to break some eggs to do so). He would for sure be the life of the party in the Gryffindor common room and he would likely get up to a lot of fun and pranks there, too.
Steve Rogers (Captain America): Gryffindor
Captain America is a more difficult person to sort than it might seem. While he seems like a complete Gryffindor, there are two personas to Steve Rogers. He has the Captain America role, which represents Gryffindor traits such as bravery, chivalry, and courage. He is also committed to saving people, and he can also be a bit reckless in the process.
On the other hand, Steve Rogers himself is a bit more introverted. His relationship with Iron Man shows some of his less-than-honest side. Steve is a good person, but he isn’t always as upfront as fans think. There's a dash of Slytherin cunning in there, though he probably wouldn't want to admit it. Alas, Gryffindor gets to claim Captain America as their own.
Tony Stark (Iron Man): Slytherin (With A Dash Of Ravenclaw)
Tony Stark might seem like a huge Slytherin, but he’s really more a mix of the two. He’s definitely ambitious, achievement-oriented, and a bit of a narcissist. He also makes a good leader, all of which are Slytherin traits.
On the other hand, though, he’s also all about wit and knowledge. He is someone who is very proud of his achievements and wants to be known for being an inventor and creator. There is a lot about Tony — and his passions — that's very Ravenclaw-like. When faced with the Sorting Hat, the choice would likely be up to Tony, just as it was for Harry Potter himself. If Tony went against heroic type and chose Slytherin, he'd be picking one of the least popular of MCU characters' Hogwarts houses, but a necessary one. The heroes need someone willing to bend the rules.
Carol Danvers (Captain Marvel): Gryffindor
Captain Marvel is also a Gryffindor. There are quite a few of them on the team, which makes sense, as they need a lot of bravery and leadership skills amongst superheroes. In Captain Marvel, Carol Danvers definitely has a bit of a reckless and proud streak, too, prime Gryffindor traits.
She is extremely courageous, always fighting to do what she thinks is right and battling to save innocent people. Captain Marvel exemplifies nerve, and she fits right in as a Gryffindor.