King Koopa is the title for the leader of the Koopa Troop. This name applies to these characters:
- Bowser, also known as King Koopa in the earlier games in the Super Mario series, known as Koopa in Japan.
- Morton Koopa Sr., Bowser's father. Known as King Koopa in the Diaper Duty series.
- King Koopa (Super Mario Bros. Super Show!), Bowser as he appears in the earlier DiC cartoons The Super Mario Bros. Super Show!, The Adventures of Super Mario Bros. 3 and Super Mario World. He's also the star of King Koopa's Kool Kartoons.