Captain America, Vol. 1

In 1940, Timely Comics publisher Martin Goodman responded to the growing popularity of superhero comics – particularly Superman at rival publisher National Comics Publications, the corporate predecessor to DC Comics – by hiring freelancer Joe Simon to create a new superhero for the company. Simon began to develop the character by determining who their nemesis could be, noting that the most successful superheroes were defined by their relationship with a compelling villain, and eventually settled on Adolf Hitler.He rationalized that Hitler was the "best villain of them all" as he was "hated by everyone in the free world", and that it would be a unique approach for a superhero to face a real-life adversary rather than a fictional one.

This approach was also intentionally political. Simon was stridently opposed to the actions of Nazi Germany and supported U.S. intervention in World War II, and intended the hero to be a response to the American non-interventionism movement. Simon initially considered "Super American" for the hero's name, but felt there were already multiple comic book characters with "super" in their names. He worked out the details of the character, who was eventually named "Captain America", after he completed sketches in consultation with Goodman. The hero's civilian name "Steve Rogers" was derived from the telegraphy term "roger", meaning "message received".

Goodman elected to launch Captain America with his own self-titled comic book, making him the first Timely character to debut with his own ongoing series without having first appeared in an anthology. Simon sought to have Jack Kirby be the primary artist on the series: the two developed a working relationship and friendship in the late 1930s after working together at Fox Feature Syndicate, and had previously developed characters for Timely together. Kirby also shared Simon's pro-intervention views, and was particularly drawn to the character in this regard. Goodman, conversely, wanted a team of artists on the series. It was ultimately determined that Kirby would serve as penciller, with Al Avison and Al Gabriele assisting as inkers; Simon additionally negotiated for himself and Kirby to receive 25 percent of the profits from the comic. Simon regards Kirby as a co-creator of Captain America, stating that "if Kirby hadn't drawn it, it might not have been much of anything."