Crime comics is a genre of American comic books and format of crime fiction. The genre was originally popular in the late 1940s and early 1950s and is marked by a moralistic editorial tone and graphic depictions of violence and criminal activity. Crime comics began in 1942 with the publication of Crime Does Not Pay published by Lev Gleason Publications and edited by Charles Biro. As sales for superhero comic books declined in the years after World War II, other publishers began to emulate the popular format, content and subject matter of Crime Does Not Pay, leading to a deluge of crime-themed comics. Crime and horror comics, especially those published by EC Comics, came under official scrutiny in the late 1940s and early 1950s, leading to legislation in Canada and the United Kingdom, the creation in the United States of the Comics Magazine Association of America and the imposition of the Comics Code Authority in 1954. This code placed limits on the degree and kind of criminal activity that could be depicted in American comic books, effectively sounding the death knell for crime comics and their adult themes.

Crime fiction, detective story, murder mystery, mystery novel, and police novel are terms used to describe narratives that centre on criminal acts and especially on the investigation, either by an amateur or a professional detective, of a crime, often a murder. It is usually distinguished from mainstream fiction and other genres such as historical fiction or science fiction, but the boundaries are indistinct. Crime fiction has several subgenres, including detective fiction, courtroom drama, hard-boiled fiction, and legal thrillers. Most crime drama focuses on crime investigation and does not feature the courtroom. Suspense and mystery are key elements that are nearly ubiquitous to the genre.