| Issue | #261 |
| Published | February 1960 |
| Cover Price | 0.10 USD |
| Pages | 36 |
| Editing | Mort Weisinger |
| Characters | Superman; Lois Lane; Jimmy Olsen; Perry White; Jor-El; Fortress of Solitude |
| Genre | superhero |
| Pencils | Curt Swan |
| Inks | Stan Kaye |
| Reprinted | in Superman (DC, 1939 series) #187; in Showcase Presents Superman (DC, 2005 series) #2 |
| Characters | Superman [Clark Kent]; Kandor; Fortress of Solitude; Superman robots; Big Bob Kruger; The Welder; Anti-Superman Gang; Urko the Terrible; Jor-El (Cameo); Lara (Cameo); Ma Kent (Cameo); Jimmy Olsen (Cameo); Perry White (Cameo); Lois Lane (Cameo); Alvin; Alvin's Mom; Wotsis (Cameo); Mars-Ol; Ra-Ho |
| Synopsis | Superman brings his Fortress to Metropolis so people can visit, and the Anti-Superman gang seizes upon this chance to plant a bomb in it. |
| Genre | superhero |
| Script | Jerry Siegel |
| Pencils | Wayne Boring |
| Inks | Stan Kaye |
| Notes | Secrets of the Fortress of Solitude |
| Reprinted | in Superman (DC, 1939 series) #187 (June 1966); in Showcase Presents Superman (DC, 2005 series) #2 |
| Genre | teen; humor |
| Script | Henry Boltinoff |
| Pencils | Henry Boltinoff |
| Inks | Henry Boltinoff |
| Letters | Henry Boltinoff |
| Script | Mort Weisinger |
| Pencils | Wayne Boring |
| Inks | Stan Kaye |
| Letters | typeset |
| Characters | Congo Bill; Congorilla; Janu the Jungle Boy |
| Synopsis | Congo Bill is asked to the dedication of a electrical power dam, where an attempt is made on his life. He avoids a deadly shock but accidentally rubs his magic ring and switches minds with the golden ape. Congorilla has to protect the people from Congo Bill running amok while trying to keep his body safe from the assassins. |
| Genre | superhero; jungle |
| Script | Robert Bernstein |
| Pencils | Howard Sherman |
| Inks | Howard Sherman |
| Notes | Feature moves to Adventure Comics next month with #270. |
| Reprinted | in World's Finest Comics (DC, 1941 series) #151 (August 1965) |
| Genre | humor |
| Script | Henry Boltinoff (signed) |
| Pencils | Henry Boltinoff (signed) |
| Inks | Henry Boltinoff (signed) |
| Letters | Henry Boltinoff |
| Notes | Ad for Adventure Comics #269, Superman's Girl Friend, Lois Lane #15, and Superboy #79. |
| Characters | Supergirl; Streaky the Supercat (intro); X-Kryptonite (intro) |
| Synopsis | Supergirl recovers a small Kryptonite meteor and unsuccessfully tries to find a chemical combination that will render it harmless. Later, Linda saves a stray orange cat from a dog. The cat follows her home to the orphanage, where Linda gets permission to keep him. Because of the white markings on his side, she calls him Streaky. Streaky discovers the piece of discarded Kryptonite, and receives super-powers from it. Streaky feeds some stray cats by tipping over a milk truck and chases off a bullying dog. Eventually his "meows" attract Supergirl and the two have some super-fun before Streaky's powers fade. |
| Genre | superhero |
| Script | Jerry Siegel |
| Pencils | Jim Mooney |
| Inks | Jim Mooney |
| Reprinted | in Action Comics (DC, 1938 series) #334 (March 1966); in Supergirl Archives (DC, 2001 series) #1; in Showcase Presents: Supergirl (DC, 2007 series) #1 |