The Andorian homeworld, sometimes called "Andor," a longtime member of the Federation whose inhabitants are distinguished by their blue skin, white hair and antennae. The planet is also host to an Andorian subspecies called the Aenar, who live in isolation from the rest of their world. The albino Aenar are blind but strongly telepathic.

Andoria is an icy world orbiting a ringed gas giant. The temperature rises above the freezing point of water only a few weeks at a time in some zones, which is considered a heat wave. Andorian cities are built underground to take advantage of geothermal energy.

Also native to the planet is a flying mammal called the Redbat.