Pulp magazines (often referred to as "the pulps") are inexpensive fiction magazines that were published from 1896 through the 1950s. The term pulp derives from the cheap wood pulp paper on which the magazines were printed; in contrast, magazines printed on higher quality paper were called "glossies" or "slicks". The typical pulp magazine had 128 pages; it was 7 inches (18 cm) wide by 10 inches (25 cm) high, and 0.5 inches (1.3 cm) thick, with ragged, untrimmed edges.

In their first decades, pulps were most often priced at ten cents per magazine, while competing slicks cost 25 cents apiece. Pulps were the successors to the penny dreadfuls, dime novels, and short fiction magazines of the 19th century. Although many respected writers wrote for pulps, the magazines were best known for their lurid and exploitative stories and sensational cover art. Modern superhero comic books are sometimes considered descendants of "hero pulps"; pulp magazines often featured illustrated novel-length stories of heroic characters, such as The Shadow, Doc Savage, and The Phantom Detective.