- See also: Background Races
The Milky Way and Andromeda galaxies are populated with countless races and species, from advanced star-spanning civilizations to dangerous wild creatures.
Milky Way
Citadel Races
| Asari | Drell | Elcor | ||
| Hanar | Humans | Keepers | ||
| Salarians | Turians | Volus |
Non-Citadel Races
| Batarians | Collectors | Geth | ||
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| Krogan | Leviathans | Quarians | ||
| Raloi | Reapers | Virtual Aliens |
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| Vorcha | Yahg |
Historical Races
| Arthenn | Densorin | Inusannon | ||
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| Oravores | Protheans | Rachni | ||
| Thoi'han | Zeioph | Zha'til |
Non-Sapient Creatures
| Husks | Thresher Maws | Varren |
Other Creatures
| Gas Bags | Harvesters | Kirik | ||
| Klixen | Nathak | Pod Crabs | ||
| Pyjaks | Space Beetles | Space Cows |
| The Thorian | Unknown Creature |
Andromeda
Intelligent Races
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| Angara | Jardaan | Kett | Remnant |
Creatures
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| Challyrion | Drall | Echidna | Eiroch | ||||
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| Galorn | Kaerkyn | Manta | Pallad | ||||
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| Rylkor | Shemrys | Spitbug | Taurg | ||||
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| Wild Adhi |


















