Dangerous Visions is a science fiction short story anthology edited by American writer Harlan Ellison and illustrated by Leo and Diane Dillon. It was published in 1967.

A path-breaking collection, Dangerous Visions helped define the New Wave science fiction movement, particularly in its depiction of sex in science fiction. Writer/editor Al Sarrantonio writes how Dangerous Visions "almost single-handedly [...] changed the way readers thought about science fiction."

Contributors to the volume included 20 authors who had won, or would win, a Hugo, Nebula, World Fantasy, or BSFA award, and 16 with multiple such awards. Ellison introduced the anthology both collectively and individually while authors provided afterwords to their own stories.