The Six realms (Tibetan: rigs drug gi skye gnas), are six divisions of the possible states of rebirth in traditional Buddhist cosmology. They represent all the possibilities, good and bad, of life in {{IAST|saṃsāra}}. They include rebirth as a deva, an asura, a human being, an animal, a hungry ghost, or a being in Naraka (hell).

The Six realms are also called the "six paths of rebirth", the "six paths of suffering", the "six planes", and the "six lower realms" (by contrast with the higher attainments of the Ten spiritual realms).

This division is most commonly seen in Tibetan Mahāyāna Buddhism.

In the Bhavacakra (example), a popular depiction of the Six realms, the realm of the Devas is placed at the top, followed clockwise by the realms of the Asuras, the Pretas, Naraka, Animals, and Humans.

Note that the ranking of the realms may differ among different Buddhist traditions; for instance, some traditions place the Asura realm second, before the Human realm.