Dave Cockrum is an American comic book artist. He is best known for his work on DC Comics' Legion of Super-Heroes, and for his role in co-creating, designing and pencilling Marvel Comics' revival of the X-Men (with writer Len Wein).

Cockrum's work on the Legion (beginning in the early 1970s) is generally seen as redefining the team. Certainly he redefined the look of the Legion, creating new costumes and designs that would last until artist Keith Giffen did a similar revamp in the 1980s.

At Marvel, Cockrum and Wein (under the direction of editor Roy Thomas) put together the new X-Men, co-creating such characters as Storm, Nightcrawler and Colossus (some of which had been designed by Cockrum as possible additions to the Legion during his tenure). These characters made their debut in Giant-Size X-Men #1 (Summer 1975), and then in a relaunched Uncanny X-Men (beginning with issue #94). Wein left after an issue and a half, succeeded by Chris Claremont, the team's primary writer from then on. Cockrum stayed with the title until 1977, when he was replaced by penciller John Byrne. When Byrne in turn left in 1981, Cockrum returned to the title, but left again in 1983.

Cockrum has also pencilled and/or inked a number of other titles for both Marvel and DC, and was Marvel's primary cover artist in the late 1970s.

In recent years Cockrum has worked less frequently in comics. In 2004 he became seriously ill due to complications from diabetes and pneumonia; a number of fellow artists organised a fund-raising project, and Marvel announced it would compensate him for his work in co-creating the highly successful X-Men.