Damage is a codename held by two completely unrelated people in the DC Universe.

• The first, Grant Emerson, is a super-hero and vigilante with great destructive energy powers. The son of the original Atom, he was part of an experimental project that gave him the combined DNA of the world's most powerful heroes. This experiment was called Project Telemachus. His power is a charge of energy constantly building inside him that he can use for various purposes, including enhanced strength and energy beams. He has been a member of the Black Lantern Corps, Freedom Fighters, Justice Society, Teen Titans and Young Justice.
• The second, Ethan Avery, is a man who gained powers after being experimented on by Colonel Marie Jonas.

The Grant Emerson version of Damage was created by Tom Joyner and Bill Marimon, first appearing in Damage #1 (1994). The Ethan Avery version of Damage was created by Robert Venditti and Tony S. Daniel, first appearing in Dark Days: The Casting #1 (2017).