Bob Farrell (born Isidore Katz) was an American attorney, editor, and publisher of comic books and magazines. After a decade as a lawyer, he entered the comics industry in 1930s, writing for the newspaper strips Lightnin’and Lone Rider for his own company, the Associated Features Syndicate, illustrated by Jack Kirby and Frank Robbins and reprinted in Famous Funnies, as well as Scorchy Smith (AP Newsfeatures). He also produced comics for the Eisner & Iger studio, sometimes using the pseudonyms Bob Farrow and Bob Lerraf.

In 1940, he worked as an editor for Fox Comics, co-developing the Comicscope, a comic strip projector sold in Fox’s publications. He co-owned Elliott Publishing (1940–1945) and founded Farrell Publications (1940–1958), producing titles such as Captain Flight Comics.

By 1951, Farrell Publications returned to one of his earlier successes, publishing a new version of Lone Rider. Later, in 1957, another new series was released, retitled The Rider, possibly due to potential legal issues with the Lone Ranger.

In the early 1950s, he also established the Farrell Comic Group, publishing under imprints including Ajax-Farrell, America’s Best, and Decker Publications. Artists such as Matt Baker, L. B. Cole, Steve Ditko, and Ken Battefield contributed to these titles. Farrell acquired the rights to Phantom Lady in 1954 and published four issues of the series. His horror line included Fantastic Fears, Haunted Thrills, Strange Fantasy, and Voodoo, most of which were discontinued due to Fredric Wertham’s criticisms and Senate scrutiny of horror comics.

After leaving comics, Farrell focused on magazines and newspapers. In 1958, he launched the humor magazine Panic (Health Publications) and in 1960 acquired the assets of the Brooklyn Eagle, briefly reviving it in 1962–1963. From 1969 to 1981, he worked with Myron Fassat the horror magazine publisher Eerie Publications and also briefly revived the New York Daily Mirror (1971–1972).