Aliens is the term derived to species that are not native to a planet. For example, Kryptonians are Aliens to the planet Earth, as are Martians and so forth. There are thousands of different alien species native from the thousands of planets in the Universe.
- Maltusian - The earliest race to exist.
- Oan - Race of small blue skinned immortals evolved from the Maltusian.
- Kryptonian - Race of highly sophisticated humanoids.
- Human - Race of humanoids identical to Kryptonians.
- Ungaran - Purple skinned humanoids.
- Thanagarian - Humanoids identical to Humans and Kryptonians with large wings.