- Letters
- typeset
teaser on dust jacket flaps (inside front and inside back)
- Script
- ?
- Pencils
- Curt Swan
- Inks
- Stan Kaye
- Colors
- Tom McCraw; Rick Taylor
- Letters
- ?
- Genre
- superhero
- Characters
- Lightning Lad [as Lightning Boy]; Saturn Girl; Cosmic Boy
Title and credits page with indicia information, illustrated with a detail from the cover of Adventure Comics (DC, 1938 series) #247.
- Script
- Mike Gold
- Pencils
- John Forte (spot illustration 1); John Byrne (spot illustration 2)
- Inks
- John Forte (spot illustration 1); John Byrne (spot illustration 2)
- Colors
- Tom McCraw; Rick Taylor
- Letters
- typeset
- Characters
- Bouncing Boy (spot illustration 1); Legion of Super-Heroes [Superboy; Lightning Lad; Saturn Girl; Cosmic Boy; Triplicate Girl] (spot illustration 2)
- Reprints
The first illustration is taken from Adventure Comics (DC, 1938 series) #301; the second illustration is taken from Interlac (the Legion APA).
- Script
- ?
- Pencils
- Curt Swan
- Inks
- George Klein
- Colors
- Tom McCraw; Rick Taylor
- Letters
- ?
- Genre
- superhero
- Characters
- Phantom Girl; Triplicate Girl; Brainiac 5; Lightning Lad; Bouncing Boy; Invisible Kid; Shrinking Violet; Cosmic Boy; Chameleon Boy; Saturn Girl; Colossal Boy; Sun Boy
- Synopsis
- Origins and powers of 12 of the Legionnaires.
- Reprints
- Script
- Otto Binder
- Pencils
- Al Plastino
- Inks
- Al Plastino
- Colors
- Tom McCraw; Rick Taylor
- Letters
- ?
- Genre
- superhero
- Characters
- Superboy; Legion of Super-Heroes [Cosmic Boy; Lightning Lad [as Lightning Boy]; Saturn Girl]; Jonathan Kent (cameo)
- Synopsis
- Three teens from the future offer Superboy membership in their super-hero club. But when Superboy fails to complete three simple tasks, the Legionnaires pretend to reject him, until they reveal that the three tasks were merely intitiation pranks which proved he is a good sport.
- Reprints
First appearance of the Legion of Super-Heroes. Lightning Lad is called Lightning Boy in this story only and all three Legionnaires appear in these costumes in this issue only. Several other unidentified Legionnaires appear in this story, including one who is colored to imply he is Brainiac 5.
- Script
- Jerry Siegel
- Pencils
- George Papp
- Inks
- George Papp
- Colors
- Tom McCraw; Rick Taylor
- Letters
- Joe Letterese
- Genre
- superhero
- Characters
- Superboy; Legion of Super-Heroes [Cosmic Boy; Lightning Lad; Saturn Girl]; Krypto; Martha Kent; Jonathan Kent
- Synopsis
- The Legion returns to 20th Century to discredit Superboy and exile him from Earth.
- Reprints
Second appearance of the Legion of Super-Heroes
- Script
- Jerry Siegel
- Pencils
- Jim Mooney
- Inks
- Jim Mooney
- Colors
- Tom McCraw; Rick Taylor
- Letters
- Joe Letterese
- Genre
- superhero
- Characters
- Supergirl; Legion of Super-Heroes [Cosmic Boy; Lightning Lad; Saturn Girl; Chameleon Boy; Colossal Boy; Invisible Kid]; Superman
- Synopsis
- The Legion comes to the 20th century to meet Supergirl and invites her to come to the 30th Century to apply to join the Legion.
- Reprints
Third appearance of the Legion of Super-Heroes; first appearance of Chameleon Boy, Colossal Boy, and Invisible Kid.
- Script
- Jerry Siegel
- Pencils
- George Papp
- Inks
- George Papp
- Colors
- Tom McCraw; Rick Taylor
- Letters
- Joe Letterese
- Genre
- superhero
- Characters
- Superboy; Lex Luthor; Lana Lang; Jonathan Kent; Krypto; Lightning Lad; Cosmic Boy (cameo); Saturn Girl (cameo)
- Synopsis
- Luthor lures Superboy into a kryptonite trap, but he is saved by a timely appearance of Lightning Lad.
- Reprints
Luthor speculates about the existence of a Legion of Super-Villains, and their future first appearance is plugged in the final caption of the story.
- Script
- Otto Binder
- Pencils
- George Papp
- Inks
- George Papp
- Colors
- Tom McCraw; Rick Taylor
- Letters
- Joe Letterese
- Genre
- superhero
- Characters
- Superboy; Lana Lang; Star Boy; Legion of Super-Heroes [Chameleon Boy; Lightning Lad; Saturn Girl; Cosmic Boy] (in flashback)
- Synopsis
- Lana uses Star Boy in an attempt to make Superboy jealous.
- Reprints
First appearance of Star Boy, who has powers similar to Superboy's in this story only. Story is re-written version of story from Adventure Comics (DC, 1938 series) #195 (December 1953).
- Script
- Jerry Siegel
- Pencils
- Jim Mooney
- Inks
- Jim Mooney
- Colors
- Tom McCraw; Rick Taylor
- Letters
- ?
- Genre
- superhero
- Characters
- Supergirl; Legion of Super-Heroes [Saturn Girl; Phantom Girl; Triplicate Girl; Cosmic Boy; Lightning Lad; Shrinking Violet; Bouncing Boy; Sun Boy; Brainiac 5]; Brainiac; Koko; Lori Lemaris; Jerro; Krypto
- Synopsis
- Supergirl again travels to the 30th century to tryout for the Legion, and this time is inducted alongside Brainiac 5.
- Reprints
First apprearances of Phantom Girl, Triplicate Girl, Shrinking Violet, Bouncing Boy, Sun Boy, and Brainiac 5.
- Script
- Robert Bernstein
- Pencils
- George Papp
- Inks
- George Papp
- Colors
- Tom McCraw; Rick Taylor
- Letters
- Joe Letterese
- Genre
- superhero
- Characters
- Superboy [Kal-El]; Mon-El [also as Bob Cobb]; Martha Kent; Jonathan Kent; Krypto (cameo); Jor-El (flashback); Lara (flashback)
- Synopsis
- When a space ship crashes outside Smallville, Superboy finds an amnesiac super-powered youth who might be his older brother. He christens him Mon-El and sets him up with a secret identity, but he soon finds evidence that Mon-El is not in fact Kryptonian.
- Reprints
First appearance of Mon-El. Story is re-written version of "Superman's Big Brother" from Superman (DC, 1939 series) #80 (January-February 1953).
- Script
- Robert Bernstein
- Pencils
- George Papp
- Inks
- George Papp
- Colors
- Tom McCraw; Rick Taylor
- Letters
- Joe Letterese
- Genre
- superhero
- Characters
- Superboy; Mon-El [Bob Cobb; Lar Gand] (origin); Martha Kent; Jonathan Kent; Lana Lang; Miss Joyce; King Mycerinua; Rhodopis; Jor-El (flashback); Lara (flashback); Phantom Zone
- Synopsis
- Trying to prove Mon-El isn't actually Kryptonian, Superboy accidentally exposes him to lead, which both poisons him and returns his memory. He remembers that he is a space explorer from Daxam named Lar Gand, who visited Krypton, meeting Jor-El and Lara, before arriving on Earth. To save his life, Superboy sends Lar Gand into the Phantom Zone until he can cure him of his lead poisoning.
- Reprints
- Script
- Jerry Siegel
- Pencils
- Curt Swan
- Inks
- Sheldon Moldoff
- Colors
- Tom McCraw; Rick Taylor
- Letters
- Milt Snapinn
- Genre
- superhero
- Characters
- Superman; Legion of Super-Heroes [Lightning Man; Cosmic Man; Saturn Woman]; Lex Luthor; Legion of Super-Villains [Cosmic King; Lightning Lord; Saturn Queen]
- Synopsis
- Luthor contacts and teams up with the Legion of Super-Villains from 30th Century.
- Reprints
First appearance of adult Legion of Super-Heroes and Legion of Super-Villains
- Script
- Robert Bernstein
- Pencils
- George Papp
- Inks
- George Papp
- Colors
- Tom McCraw; Rick Taylor
- Letters
- Joe Letterese
- Genre
- superhero
- Characters
- Superboy; Tom Tanner; Martha Kent; unnamed Sun Boy impostor; Legion of Super-Heroes [Brainiac 5; Saturn Girl; Lightning Lad, Chameleon Boy; Cosmic Boy; Phantom Girl, Sun Boy]; Lana Lang; Krypto
- Synopsis
- An impostor Sun Boy has Superboy help him assemble a robot.
- Reprints
Story is in part a re-written version of "The Two Clark Kents" from Adventure Comics (DC, 1938 series) #191 (August 1953). Writer credit from index of original issue. Credited as "Unknown" in Table of Contents.
- Script
- Jerry Siegel
- Pencils
- Curt Swan
- Inks
- George Klein
- Colors
- Tom McCraw; Rick Taylor
- Letters
- Milt Snapinn
- Genre
- superhero
- Characters
- Superboy; Lana Lang; Jonathan Kent; Martha Kent; Krypto; Legion of Super-Heroes [Lightning Lad; Cosmic Boy; Saturn Girl]; Jax-Ur; General Zod; Mon-El; Legion of Super-Pets [Krypto; Streaky; Super-Monkey; Super-Horse]
- Synopsis
- The Brain-Globes of Rambat attempt to use the Legion in their plan to take over Earth, but the Legion gather the Legion of Super-Pets who can't be mind-controlled.
- Reprints
First appearance of the Legion of Super-Pets. Also first appearance of Supergirl's Super-Horse, before his first appearance in her series.
- Script
- Jerry Siegel
- Pencils
- Jim Mooney
- Inks
- Jim Mooney
- Colors
- Tom McCraw; Rick Taylor
- Letters
- Milt Snapinn
- Genre
- superhero
- Characters
- Supergirl; Fred Danvers; Edna Danvers; Legion of Super-Heroes [Cosmic Boy; Lightning Lad; Saturn Girl; Sun Boy; Bouncing Boy; Brainiac 5]; Whizzy
- Synopsis
- During a trip to the 30th century, the Legionnaires seemingly lose their powers and Supergirl must cover for them, but it is really a trap to send her into the Phantom Zone.
- Reprints
- Script
- Jerry Siegel
- Pencils
- Jim Mooney
- Inks
- Jim Mooney
- Colors
- Tom McCraw; Rick Taylor
- Letters
- Milt Snapinn
- Genre
- superhero
- Characters
- Supergirl; Fred Danvers; Edna Danvers; Superman; Helen of Troy; Legion of Super-Heroes [Lightning Man; Cosmic Man; Phantom Woman; Triplicate Woman?; Chameleon Man; Sun Man; Saturn Woman]; Luma Lynai
- Synopsis
- Supergirl tries to find the perfect mate for Superman.
- Reprints
- Script
- Jerry Siegel
- Pencils
- Curt Swan
- Inks
- George Klein
- Colors
- Tom McCraw; Rick Taylor
- Letters
- Milt Snapinn
- Genre
- superhero
- Characters
- Superboy; Ultra Boy [Jo Nah, also as Gary Crane], Marla Latham [also as Ben Crane]; Pete Ross; Jonathan Kent; Krypto; Lana Lang
- Synopsis
- Ultra Boy must discover Superboy's secret identity as an initiation test for entrance into the Legion.
- Reprints
First appearances of Ultra Boy and Marla Latham.
- Script
- Jerry Siegel
- Pencils
- John Forte; Al Plastino (page 4 and some Superboy and Luthor faces only)
- Inks
- John Forte; Al Plastino (page 4 and some Superboy and Luthor faces only)
- Colors
- Tom McCraw; Rick Taylor
- Letters
- Milt Snapinn
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Cosmic Boy; Saturn Girl; Lightning Lad; Sun Boy; Superboy; Chameleon Boy (statue); Bouncing Boy (statue); Shrinking Violet (statue); Invisible Kid [Lyle Norg] (statue)]; Lex Luthor; Urthlo; Mon-El
- Synopsis
- At a regular meeting of the Legion of Super-Heroes, the Legionnaires lose control of their powers. Urthlo arrives and announces that he now controls the Legionnaires' powers and there is nothing they can do about it. But Saturn Girl comes up with a serum to temporarily cure Mon-El and immunize him against lead, and Superboy releases him from the Phantom Zone to knock out Urthlo, who turns out to be an automaton created by Lex Luthor sent into the future to destroy the Legion.
- Reprints
Mon-El becomes a member of the Legion in this story.
- Script
- Jerry Siegel
- Pencils
- John Forte
- Inks
- John Forte
- Colors
- Tom McCraw; Rick Taylor
- Letters
- Milt Snapinn
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Bouncing Boy; Sun Boy; Cosmic Boy; Shrinking Violet; Lightning Lad; Chameleon Boy; Saturn Girl; Triplicate Girl; Colossal Boy; Phantom Girl; Ultra Boy]
- Synopsis
- Bouncing Boy tells a group of applicants how he got his powers and gained acceptance into the Legion.
- Reprints
- Script
- Jerry Siegel
- Pencils
- John Forte
- Inks
- John Forte
- Colors
- Tom McCraw; Rick Taylor
- Letters
- Milt Snapinn
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Sun Boy; Cosmic Boy; Saturn Girl; Superboy; Ultra Boy; Bouncing Boy]; Pete Ross
- Synopsis
- Sun Boy loses his powers and has to find a way to recharge them.
- Reprints
- Script
- Jerry Siegel
- Pencils
- John Forte
- Inks
- John Forte
- Colors
- Tom McCraw; Rick Taylor
- Letters
- Joe Letterese
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Cosmic Boy; Saturn Girl; Sun Boy; Lightning Lad; Brainiac 5; Matter-Eater Lad; Bouncing Boy; Chameleon Boy; Shrinking Violet; Superboy]; Dr. Landro
- Synopsis
- The newest Legionnaire, Matter-Eater Lad, is accused of being a spy.
- Reprints
- Script
- Jerry Siegel
- Pencils
- John Forte
- Inks
- John Forte
- Colors
- Tom McCraw; Rick Taylor
- Letters
- Joe Letterese
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Shrinking Violet; Bouncing Boy; Sun Boy; Cosmic Boy; Chameleon Boy; Colossal Boy; Saturn Girl; Triplicate Girl; Brainiac 5; Invisible Kid; Matter-Eater Lad; Lightning Lad; Ultra Boy; Mon-El; Superboy; Supergirl]; Lori Lemaris; Zaryan the Conqueror
- Synopsis
- Saturn Girl tries to sacrifice herself after she finds out that a computer predicts the death of a legionnaire fighting Zaryan, but Lightning Lad dies instead.
- Reprints
Saturn Girl is elected Legion leader.
- Script
- Jerry Siegel
- Pencils
- John Forte
- Inks
- John Forte
- Colors
- Tom McCraw; Rick Taylor
- Letters
- Joe Letterese
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Sun Boy; Shrinking Violet; Bouncing Boy; Cosmic Boy; Mon-El [as Marvel Lad, the Legionnaire Lemon]; Saturn Girl; Cosmic Boy; Lightning Lad; Colossal Boy; Brainiac 5; Superboy (in flashback)]
- Synopsis
- In tryouts to replace the fallen Lightning Lad, Marvel Lad wows the Legionnaires, who reveals he is Mon-El, now cured by Brainiac 5.
- Reprints
- Pencils
- Curt Swan
- Inks
- Stan Kaye
- Colors
- Tom McCraw; Rick Taylor
- Letters
- ?
- Genre
- superhero
- Characters
- Superboy; Legion of Super-Heroes [Cosmic Boy; Lightning Lad [as Lightning Boy]; Saturn Girl]
- Reprints
- Pencils
- Curt Swan
- Inks
- Stan Kaye
- Colors
- Tom McCraw; Rick Taylor
- Letters
- ?
- Genre
- superhero
- Characters
- Superboy; Legion of Super-Heroes [Cosmic Boy; Saturn Girl; Lightning Lad]
- Reprints
- Pencils
- Curt Swan
- Inks
- Stan Kaye
- Colors
- Tom McCraw; Rick Taylor
- Letters
- ?
- Genre
- superhero
- Characters
- Superboy; Legion of Super-Heroes [Sun Boy; Brainiac 5; Cosmic Boy; Phantom Girl; Chameleon Boy; Saturn Girl; Lightning Lad]
- Reprints
- Pencils
- Curt Swan
- Inks
- George Klein
- Colors
- Tom McCraw; Rick Taylor
- Letters
- ?
- Genre
- superhero
- Characters
- Superboy; Legion of Super-Heroes [Lightning Lad; Cosmic Boy; Saturn Girl]
- Reprints
- Pencils
- Curt Swan
- Inks
- George Klein
- Colors
- Tom McCraw; Rick Taylor
- Letters
- Ira Schnapp
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Superboy; Sun Boy; Saturn Girl; Cosmic Boy; Lightning Lad, Triplicate Girl; Mon-El]
- Reprints
- Pencils
- Curt Swan
- Inks
- George Klein
- Colors
- Tom McCraw; Rick Taylor
- Letters
- Ira Schnapp
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Superboy; Sun Boy; Ultra Boy; Cosmic Boy; Saturn Girl]
- Reprints
- Script
- ?
- Pencils
- Curt Swan
- Inks
- Stan Kaye; George Klein
- Colors
- Tom McCraw
- Letters
- ?
- Genre
- superhero
- Characters
- Superboy; Legion of Super-Heroes [Cosmic Boy; Lightning Lad; Saturn Girl; Sun Boy; Brainiac 5; Phantom Girl; Chameleon Boy; Triplicate Girl; Mon-El]
- Reprints
Four small cover reproductions.