List of Star Trek races

Race	Home planet	Episodes M = mention only
Description
Aaamazzarite	Aaamazzara (Therbia)	Star Trek: The Motion Picture
Aaamazzarites, also called Therbians, are a hairless species with pale yellow skin. Aaamazzara orbits Epsilon Serpentis in the Alpha Quadrant. It is 70.3 light years away from Earth. Everything on the planet is bio-chemically produced from their mouths, including clothing and furniture. They are members of the United Federation of Planets. Aaamazzarite at Memory Alpha (a Star Trek wiki)
Aenar	Andor (Andoria)	"United" (ENT)
Aenar, along with the Andorians, inhabit the world of Andor (Andoria). In many regards, they are similar to the Andorians in physical appearance. However, their skin is a light blue/white color, they are almost totally blind, and they have powerful telepathic abilities. Aenar are pacifistic and do not use their mind reading abilities against the will of another individual. However, their blindness doesn't appear to hinder their ability to know that they are in the presence of a "blueskin" Andorian or detect obstacles. Aenar government, such as it is, has little structure; leaders of Aenar society are chosen as the need arises, usually when contact with outsiders is called for. The Aenar are usually considered to be just a different ethnicity of the Andorian race and not an utterly separate species. The Aenar population is approximately 11,000 in size and they inhabit the polar region of their world. Andorians believed the Aenar to be mythical creatures before their existence was confirmed circa 2104. Based on Talla, Shran's daughter from "These Are the Voyages...", it has been speculated that hybrids of an Andorian and an Aenar would be a greenish color, perhaps explaining the greenish Andorian seen in Star Trek: The Next Generation. Aenar at Memory Alpha (a Star Trek wiki)
Akritirian		"The Chute" (VOY)
The Akritirians are an advanced humanoid Delta Quadrant race with basic interstellar spaceflight, perhaps warp-capable. A dictatorship controls the planet, now dealing with an Open Sky group fighting to overthrow it. Felons are kept in an isolated spacegoing station — as the U.S.S. Voyager's Paris and Kim discovers when wrongly sent there. Pardons or rehearings in convictions and sentencing are never heard. Akritirian at Memory Alpha (a Star Trek wiki)
Allasomorph		"The Dauphin" (TNG)
An Allasomorph is an anthropomorphic shapeshifting species.
Andorian	Andoria
Andorians are a humanoid species with blue skin and antennae. They consider themselves a warrior race, in contrast with the pacifist Aenar who also live on the Andoria. They are native to the moon Andoria, which orbits the planet Andor. They were a founding member of the United Federation of Planets. Andorian at Memory Alpha (a Star Trek wiki)
Antaran		"The Breach" (ENT)
The Antarans are mentioned by Doctor Phlox to have been at war with the Denobulans on several occasions. The Denobulans have tried to put the war behind them however there are still Denobulans who hate the Antarans. The Antarans are still very bitter and are raised from birth to hate Denobulans. There appear to be two different spellings: Antarian (plural Antarians) and Antarans (both singular and plural).
Angosian		"The Hunted" (TNG)
Usually considered non-violent, 'Angosian authorities were responsible for genetically and chemically engineering soldiers to fight in their Tarsian Wars. But the process was irreversible, and the 'super soldiers' were considered outcasts and criminals that could not function or co-exist alongside the normal population of Angosian society, and as such were forced to be permanently confined to a penal settlement on an Angosian moon. Non-canon: a novel trilogy, Star Trek: The Q Continuum shows that the Angosians have had some success in later efforts to reintegrate the soldiers, as one now serves on the Enterprise-E. Angosian at Memory Alpha (a Star Trek wiki)
Antedean	Antede III	"Manhunt" (TNG)
The Antedeans from Antede III are an ichthyohumanoid species which resemble fish. While a member of the United Federation of Planets, they seldom receive visitors and thus have not been seen by many members of the Federation. Another trait that keeps them from interacting with their fellow Federation members is a strong distaste for space flight: although the Antedeans are a space-going race, space travel is quite traumatic for them. In order for individuals to deal with this problem they induce a catatonic state while in space flight. To awaken from this state takes several hours. Once awakened from the sleep Antedeans are generally ravenous and eat large portions of vermicula. There is a division in the Antedean race on whether membership in the Federation is a good thing. Ambassador Lwaxana Troi foiled a plot on Stardate 42859.2 when 2 Antedeans tried to sabotage their planet's Federation membership conference on Pacifica with ultritium concealed in their garments. Antedean at Memory Alpha (a Star Trek wiki)
Antican		"Lonely Among Us" (TNG)
The Anticans are dog-like with snouts, dark fur and white hair. They applied for Federation membership but the ruling decision was put off because of their hostilities with their neighbors, the reptilian Selay. In a quest for meat, the Antican diplomatic team supposedly cooked and consumed a member of the Selay delegation. Antican at Memory Alpha (a Star Trek wiki)
Arcadian		Star Trek IV: The Voyage Home
Arcadians have large, round, doll-like heads and have hair on the left and right sides of their heads with none in the middle. They are members of the United Federation of Planets with a representative on the Federation Council. They joined at least as early as the 2280s. Arcadian at Memory Alpha (a Star Trek wiki)
Arcturian	Arcturas	Star Trek: The Motion Picture
Arcturians are known for their clones which have the appearance of melted skin and hail from the densely populated world Arcturas. Nothing has been revealed about them in dialogue, so their backstory (by Fred Phillips and Robert Fletcher) is considered semi-canon. Arcturian at Memory Alpha (a Star Trek wiki)
Axanar
The Axanar are the first extraterrestrial race befriended by Earth people aboard the NX-01 Enterprise. Archer and his people rescue Axanar aboard a ship that has been disabled, and when both another Axanar ship, and the preying ship, show up, Archer is able to persuade the Axanar to help him fight off the preying ship. One of James T. Kirk's earliest commendations is the Palm Leaf of Axanar Peace Mission, following the Battle of Axanar; although the exact nature of the conflict is unrevealed, it is revealed in the episode "Whom Gods Destroy" that Starfleet Captain Garth of Izar achieved a great victory on behalf of the Federation, and his strategies became required reading at Starfleet Academy (since Kirk himself studied these strategies, the Battle of Axanar must thus have occurred well before Kirk entered Starfleet Academy in 2250, which was itself almost 20 years prior to "Whom Gods Destroy"). Kirk claims that the Axanar Peace Mission "topped [Garth's victory] with a greater one" and preserved the civilization that made Spock and himself "brothers", implying that the mission may have contributed to healing a serious rift in the Federation at that time. Axanar at Memory Alpha (a Star Trek wiki)