This is a list of Captain America's enemies.
The Red Skull is the alias of several supervillains appearing in American comic books published by Marvel Comics. Created by France Herron, Jack Kirby, and Joe Simon, the character first appeared in Captain America Comics #1, in which his secret identity is revealed to be George Maxon. It would later be retroactively established that Maxon was merely a decoy who was working for the real Red Skull, Johann Shmidt. Other individuals, including Albert Malik and Shmidt's own daughter Sinthea, have also adopted the Red Skull persona.
The Scourge of the Underworld is the name of a series of fictional characters appearing in American comic books published by Marvel Comics.
Baron Wolfgang von Strucker is a supervillain appearing in American comic books published by Marvel Comics. A former Nazi officer, he is one of the leaders of the Hydra terrorist organization, and the archenemy of Nick Fury and S.H.I.E.L.D. He has also come into conflict with the Avengers, and the interests of the United States, and is thus a fugitive. He has been physically augmented to be nearly ageless. While Strucker has been seemingly killed in the past, he returned to plague the world with schemes of world domination and genocide, time and time again.
The Thunderbolts are an antihero/supervillain/superhero team appearing in American comic books published by Marvel Comics. The team consists mostly of reformed supervillains. Created by Kurt Busiek and Mark Bagley, the team first appeared in The Incredible Hulk #449.
The Cobra is the name of a number of different fictional characters appearing in American comic books published by Marvel Comics.
Diamondback is a fictional character appearing in American comic books published by Marvel Comics. Originally depicted as a supervillain who was part of the Serpent Society, she was first introduced in Captain America #310 and became a series regular for years afterwards.
The Falcon is a superhero appearing in American comic books published by Marvel Comics. The character was introduced by writer-editor Stan Lee and artist Gene Colan in Captain America #117 and was the first Black American superhero in mainstream comic books.
Hydra is a fictional terrorist organization appearing in American comic books published by Marvel Comics. Its name alludes to the mythical Lernaean Hydra, as does its motto: "If a head is cut off, two more shall take its place," proclaiming the group's resilience and growing strength in the face of resistance. Originally a Nazi organization led by the Red Skull during World War II, Hydra is taken over and turned into a neo-fascist international crime syndicate by Baron Wolfgang von Strucker. Hydra agents often wear distinctive green garb featuring a serpent motif. Hydra's plans for world domination are regularly foiled by Marvel Universe superheroes and the intelligence organization S.H.I.E.L.D.
Sharon Carter is a character appearing in American comic books published by Marvel Comics. Created by Stan Lee, Jack Kirby, and Dick Ayers, the character first appeared in Tales of Suspense #75. Sharon Carter is a secret agent and an ex-field agent of S.H.I.E.L.D. under Nick Fury. She is also a love interest of the superhero Captain America / Steve Rogers. Sharon Carter was originally the younger sister of Peggy Carter. She was later retconned as Peggy's grand-niece because of the unaging nature of comic book characters.
Ophelia Sarkissian is a supervillain appearing in American comic books published by Marvel Comics. Created by Jim Steranko, the character first appeared in Captain America #110. Ophelia Sarkissian is a foe of the X-Men and the Avengers. She has also been known as Viper and Madame Hydra at various points in her history.
Crossbones is a supervillain appearing in American comic books published by Marvel Comics. Created by Mark Gruenwald and Kieron Dwyer, the character first made a cameo appearance in Captain America #359, before he was fully introduced later that month in issue #360 and his name was revealed in issue #362.
Sinthea Shmidt is a supervillain appearing in American comic books published by Marvel Comics. Created by J. M. DeMatteis writer and artist Paul Neary, the character first appeared in Captain America #290. Shmidt is the daughter of the Red Skull and an antagonist of the superhero Steve Rogers / Captain America. She has occasionally used the codenames Sin and Mother Superior. She is also the leader of the Sisters of Sin and an ally of Hydra.
Arnim Zola is a supervillain appearing in American comic books by Marvel Comics. He is a master of biochemistry and a recurring enemy of Captain America and the Avengers. The character first appeared in Captain America and the Falcon #208, and was created by writer/artist Jack Kirby. When he was first introduced, Zola was a Nazi scientist experimenting with genetic engineering during World War II. His skills as a geneticist drew the attention of the Red Skull, who recruited him into Hydra to aid their efforts to create super soldiers. One of his experiments led to the brain of Adolf Hitler being copied into a being later known as Hate-Monger. Later in life, Zola transferred his own mind into a sophisticated robot body which protected it by storing it in its chest and displaying a digital image of Zola's face on its chest plate. This robot body allowed Zola to survive until modern times, as whenever it is destroyed, Zola could simply upload his consciousness into a new body.
Helmut Zemo is a character appearing in American comic books published by Marvel Comics. Created by Roy Thomas, Tony Isabella and Sal Buscema, the character first appeared in Captain America #168. Helmut Zemo is the son of Baron Heinrich Zemo and the thirteenth Baron Zemo in his family lineage. He is a recurring adversary of the Avengers, especially the superhero Steve Rogers / Captain America. The character has also been known as Citizen V at various points in his history.
Heinrich Zemo is a supervillain appearing in American comic books published by Marvel Comics. The character was created by Stan Lee and Jack Kirby, and first made a cameo appearance in The Avengers #4, before officially being introduced in The Avengers #6. He was retroactively added into the history of Captain America upon the superhero's reintroduction in the Silver Age of Comics two issues prior. Baron Zemo is a Nazi scientist and the founder and original leader of the Masters of Evil, and is commonly depicted as one of the greatest enemies of Captain America and the Avengers. He is the twelfth Baron Zemo in his family lineage, and his legacy is continued by his son, Helmut Zemo.
Madame Hydra is the name of several different fictional supervillains appearing in American comic books published by Marvel Comics. It is a name given to a top female operative of HYDRA.
James Buchanan "Bucky" Barnes is a character appearing in American comic books published by Marvel Comics. Originally introduced as a sidekick to Captain America, the character was created by Joe Simon and Jack Kirby and first appeared in Captain America Comics #1. Barnes' original costume and the Bucky nickname have been used by other heroes in the Marvel Universe over the years.
"Captain America: The Captain", also known as "Captain America No More!", is a run of Captain America from issue 332 to issue 350, written by Mark Gruenwald. In this story arc, Steve Rogers temporarily gives up his superhero identity and is replaced by John Walker, before Rogers decides to return.