| 0 | - | cover | 1 | pencils: Curt Swan; inks: Neal Adams; letters: Gaspar Saladino | Imra Ardeen, Brainiac 5, Cosmic Boy, Querl Dox, Luornu Durgo, Kara Zor-El, Clark Kent, Rokk Krinn, Krypto, Lightning Lad, Dirk Morgna, Jo Nah, Phantom Girl, Garth Ranzz |
| 1 | Table of Contents | table of contents | 1 | pencils: Curt Swan; inks: George Klein | Clark Kent, Krypto, Superboy |
| 2 | The Origin of the Legion! | comic story | 8 | script: E. Nelson Bridwell; pencils: Pete Costanza; inks: Pete Costanza; letters: Milt Snapinn | Gim Allon, Imra Ardeen, Jan Arrah, Brainiac 5, R. J. Brande First, Chameleon Boy, Colossal Boy, Cosmic Boy, Reep Daggle, Ren Daggle First, Salu Digby, Querl Dox, Luornu Durgo, Kara Zor-El |
| 3 | The Boy with Ultra-Powers! | comic story | 13 | script: Jerry Siegel; pencils: Curt Swan; inks: George Klein; letters: Milt Snapinn | Clark Kent, Jonathan Kent, Martha Kent, Krypto, Lana Lang, Pete Ross, Superboy |
| 4 | - | in-house column | 1 | pencils: Neal Adams, Irv Novick; inks: Neal Adams, Irv Novick | Superman Revenge Squad; Batman Revenge Squad; Superman (statue); Batman (statue); Hellcats |
| 5 | The Legion of Super-Traitors! | comic story | 14 | script: Jerry Siegel; pencils: Curt Swan; inks: George Klein; letters: Milt Snapinn | Imra Ardeen, Beppo, Biron, Comet, Cosmic Boy, Lar Gand, Clark Kent, Jonathan Kent, Martha Kent, Rokk Krinn, Krypto, Lana Lang, Lightning Lad, Mon-El |
| 6 | Supergirl's Three Super-Girl Friends! | comic story | 12 | script: Jerry Siegel; pencils: Jim Mooney; inks: Jim Mooney; letters: Joe Letterese | Imra Ardeen, Bouncing Boy, Brainiac 5, Cosmic Boy, Salu Digby, Querl Dox, Luornu Durgo, Kara Zor-El, Rokk Krinn, Krypto, Lori Lemaris, Lightning Lad, Dirk Morgna, Phantom Girl |
| 7 | The Secret of the Seventh Super-Hero! | comic story | 13.67 | script: Robert Bernstein; pencils: George Papp; inks: George Papp; letters: Joe Letterese | Imra Ardeen, Brainiac 5, Chameleon Boy, Cosmic Boy, Reep Daggle, Querl Dox, Clark Kent, Martha Kent, Rokk Krinn, Lana Lang, Lightning Lad, Dirk Morgna, Chief Parker, Phantom Girl |
| 8 | Who Are They? | promo (ad from the publisher) | 0.33 | pencils: ? (logo illustration); inks: ? (logo illustration); colors: ? (logo illustration); letters: typeset | |
| 9 | The Legion of Super-Villains! | comic story | 11 | script: Jerry Siegel; pencils: Curt Swan; inks: Sheldon Moldoff; letters: Milt Snapinn | Superman; Lex Luthor; Legion of Super-Villains [Cosmic King; Lightning Lord; Saturn Queen]; Legion of Super-Heroes [Lightning Man (adult Lightning Lad); Cosmic Man (adult Cosmic Boy); Saturn Woman (adult Saturn Girl)] |
| 10 | The Lore of the Legion | text article | 1 | script: E. Nelson Bridwell | |