Whitney Ellsworth asks Sheldon Mayer to create two new children's titles to breathe life into the dying line of cartoon books.  Sugar and Spike and Three Mouseketeers are the result.

Ed Hamilton’s Batwoman appears in Detective 233, possibly created in response to a Martin and Lewis movie, Artists and Models (1955) which features a character called the Bat Lady.  Silver Age of comics begins?

All American Men of War 35 features a washtone cover by Jerry Grandenetti and Jack Adler.  The first of many spectacular covers which appear to be "painted".  Most of them appear on war comics.
 

Official Overstreet Price Guide endorsed start of the Silver Age of Comics.

The Davy Crocket boom ends as quickly as it began as Frontier Fighters (#8) and  Legends Of Daniel Boone are cancelled (#8)
 

Showcase changes to two issue tryouts.  Joe Simon and Jack Kirby’s Challengers of the Unknown is the first, originally put together for their defunct Mainline Comics. 

Tales of the Unexpected 15 sports an Adler wash cover- the first outside the war titles.
 

American News goes bankrupt- National's Independent News begins distributing Mad with issue 35.  Independent News also takes over the distribution of Martin Goodman's Marvel Comics , restricting them to eight titles a month.

Buzzy cancelled (#76).

National begins canceling their line of kids comics beginning with Dodo and Frog (92), Nutsy Squirrel (72) and the Raccoon Kids (64).  Last few issues of these titles came out very sporadically.

Detective Comics 251 begins a string of "aliens vs Batman" stories generally looked down upon by fans today.
 

Flash is brought back for a two issue try out in Showcase (13-14).

Big Town cancelled (#50)
Robin Hood Tales cancelled (#14)
 

Jackie Gleason And The Honeymooners cancelled (#12) as the tv series ends.

Otto Binder's Legion of Super Heroes first appears in Adventure Comics #247.

My Greatest Adventure pushes science fiction (20)
 

Ross Andru takes over the art inside Wonder Woman from Harry G. Peter (98).

Once All-American's best -selling title, National determines Mutt & Jeff is getting long in the tooth and allows the rights  to expire. (103) Harvey picks them up and continues it to 1965.

Jack Kirby takes over the art on Green Arrow in Adventure 250.

Otto Binder creates Brainiac and Kandor in Action 242
 

House of Secrets turns towards science fiction, with a Kirby cover even (11).
 

Otto Binder turns Jimmy Olsen into  Elastic Lad in Jimmy Olsen 31.  No sign of Plastic Man, though.

House of Mystery takes a decided turn towards science fiction.

Matt Savage Trail Boss debuts in Western 77

First comic book appearance of Bizarro in Superboy 68, based on the Superman newspaper strip story by Alvin Schwartz.

Dinosaurs appear on the cover of Tomahawk 58!

National moves to 575 Lexington Ave.

National published 410 books in 1958, a number that would not be reached again until 1983.  Cutbacks continue to decrease the size of the line until 1962.

The ultimate DC Gorilla strip is created, as Robert Bernstein converts Whitnery Ellsworth's hackneyed Congo Bill into Congorilla in Action 248.

Jack Miller(?) creates Lady Blackhawk in Blackhawk 133.
 

Whitney Ellsworth no longer listed as editor of all titles.  Actual editors listed from this point onwards.  Mort Weisinger takes over editing the back features in Adventure and Action from George Kashdan.

Mort Weisinger states in the Superboy 71 letters page, that there will be no more anachronisms in Superboy stories.  They will accurately reflect the world of the early thirties.

According to E. Nelson Bridwell, "Superman vs the Futuremen" in Superman 128 is the last "Earth 2" story, because the plot precludes the existence of Superboy.

Tommy Tommorow moves to World's Finest, replacing Tomahawk..

Hopalong Cassidy cancelled (#135).

Bill Finger creates Bat-Mite in Detective 267

Jack Miller's Rip Hunter, Time Master begins in Showcase 20.

Sgt Rock series  begins in Our Army at War 83.

Jack Kirby leaves National after Challengers #8 due to a dispute with editor Jack Schiff over the Sky Masters comic strip.  He freelances among  a number of comic companies before finally settling at Marvel.

Wonder Girl begins a string of cover appearances on Wonder Woman 107.

Mort Weisinger begins to experiment with continued stories starting with a Bizarro two-parter in Action 254-5.

Madamoiselle Marie begins in Star-Spangled War 84.

Adam Strange and Space Ranger aren't arwarded their own books after their Showcase stints but they do get the lead spots in Mystery In Space 53 and Tales of the Unexpected 40.

Superman's golden age pest,  Mxyzptlk is revived with a slightly different name in Superman 131, presumably because no one could remember how to spell it.

Joe Simon brings super-heroes back to the Archie Company with the Adventures of the Fly and the Double Life of Private Strong.  Jack Kirby contributes a few pages.

Finally convinced that super-heroes might be making a comeback, National allows John Broome and Gil Kane to recreate Green Lantern in Showcase 22.  Julie Schwartz edits.  The new version is science-fiction rather than magical.

National continues to go to the dogs as- Pooch is added to the cast of  Gunner and Sarge in Our Fighting Forces 49.

First appearance of Super Monkey in Superboy 76. 

Adventures Of Rex The Wonder Dog cancelled (#46)

After 4 years of keeping his existence a secret the Martian Manhunter’s presence is revealed to the world in Detective 273.