Deathlok is the name of several fictional characters appearing in American comic books published by Marvel Comics. The first Deathlok, Luther Manning, appeared in Astonishing Tales #25, created by Rich Buckler. At least five subsequent Marvel characters have used the "Deathlok" identity since then: Michael Collins, Jack Truman, Rebecca Ryker, Henry Hayes, and Jemma Simmons. A recurring theme among these characters is that a dead human has been reanimated with cybernetic technology. "Deathlok technology" has also been used thematically by Marvel writers in other stories.

Astonishing Tales is an American anthology comic book series originally published by Marvel Comics from 1970 to 1976. Its sister publication was Amazing Adventures.