The Marvel Comics superhero Thor debuted in the science fiction/fantasy anthology title Journey into Mystery #83 (cover-date Aug. 1962), and was created by editor-plotter Stan Lee, scripter Larry Lieber, and penciller Jack Kirby. A different version of the mythological Thor had appeared previously in Venus #12-13 (Feb.-April 1951). Lee in 2002 described Thor's genesis early in the Marvel pantheon, following the creation of the Hulk:
[H]ow do you make someone stronger than the strongest person? It finally came to me: Don't make him human — make him a god. I decided readers were already pretty familiar with the Greek and Roman gods. It might be fun to delve into the old Norse legends... Besides, I pictured Norse gods looking like Vikings of old, with the flowing beards, horned helmets, and battle clubs. ...Journey into Mystery needed a shot in the arm, so I picked Thor ... to headline the book. After writing an outline depicting the story and the characters I had in mind, I asked my brother, Larry, to write the script because I didn't have time. ...and it was only natural for me to assign the penciling to Jack Kirby...
Subsequent stories of the 13-page feature "The Mighty Thor" continued to be plotted by Lee, and were variously scripted by Lieber or by Robert Bernstein, working under the pseudonym "R. Berns". Various artists penciled the feature, including Jack Kirby, Joe Sinnott, Don Heck, and Al Hartley. With Journey into Mystery #101 (Feb. 1964), the series began a long and definitive run by writer and co-plotter Lee and penciler and co-plotter Kirby that lasted until the by-then-retitled Thor #179 (Aug. 1970).
Lee and Kirby included Thor in The Avengers #1 (Sept. 1963) as a founding member of the superhero team. The character has since appeared in every subsequent volume of the series.