Commander Steel (also Captain Steel) is the name of three comic book superheroes appearing in publications by the American publisher DC Comics, all members of the same family. The first Steel appeared in Steel, The Indestructible Man #1 (1978) published by DC Comics, and was created by Gerry Conway and Don Heck. His stories were set in World War II. The two later characters called Steel are his grandsons.

Nate Heywood / Steel appears in Legends of Tomorrow, starting from the second season, portrayed by Nick Zano, while his grandfather Henry Heywood / Commander Steel was portrayed by Matthew MacCaull.