K
- Kalki (father of Celsius)
- Karma (member of the Doom Patrol)
- Key
- Kid Slick (member of the Doom Patrol)
- Killer Croc
- Killer Frost I and II
- Killer Wasp I and II
- Killowat
- Kole (alias Kole Weathers)
- Krag (a New Blood)
- Kryptonite Man
- Kung
Read more about this topic: List Of Metahumans In DC Comics