United Federation of Planets logo

In 2373, the United Federation of Planets consisted of at least one hundred and fifty member planets, spread over eight thousand light years. (Star Trek: First Contact)

Presumably the admission policy of the Federation regards governments and/or planets, and not whole species. In practice, a planet had to be unified under one joint government until it can apply for Federation membership. However, there were potential exceptions, such as the Kes.

Founding members Edit

Federation founding ceremony, 2161

The Founding Ceremony

The United Federation of Planets was founded in 2161 by the following members:

Homeworld of the Andorians and the Andorian Empire. (ENT: "Zero Hour", "These Are the Voyages...")
Homeworld of the Humans and United Earth. (ENT: "Zero Hour", "These Are the Voyages...")
Tellar Prime 
Homeworld of the Tellarites. (ENT: "Zero Hour", "These Are the Voyages...")
Homeworld of the Vulcans and the Vulcan High Command. (TNG: "Gambit, Part II"; ENT: "Zero Hour", "These Are the Voyages...")
According to several background sources, including the Star Fleet Technical Manual, Star Trek: Star Charts, "It's Federation Day!", a newspaper article created as background material for Star Trek Generations, and the novel Articles of the Federation, the independent Alpha Centauri (or the Alpha Centauri Concordium) was the fifth original founding member of the Federation.

Council members Edit

Federation Council chamber, 2286

The Federation Council

The following are members of the Federation who are known to be on the Federation Council.

Arcadian homeworld 
Homeworld of the Arcadians. (Star Trek IV: The Voyage Home)
Ariolo homeworld 
Homeworld of the Ariolo. (Star Trek IV: The Voyage Home)
Bzzit Khaht homeworld 
Homeworld of the Bzzit Khaht. (Star Trek IV: The Voyage Home)
Caitian homeworld 
Homeworld of the Caitians. (Star Trek IV: The Voyage Home)
Delta IV 
Homeworld of the Deltans. (Star Trek IV: The Voyage Home)

Jaresh-Inyo, the Grazerite Federation President in 2372

Grazerite homeworld 
Homeworld of the Grazerites. (DS9: "Homefront")
Kasheeta homeworld 
Homeworld of the Kasheeta. (Star Trek IV: The Voyage Home)
Unnamed Federation planet 
Home to the unnamed alien council members. (Star Trek IV: The Voyage Home)
The hat props worn by these aliens were presumably mistakenly cataloged under the species name Kazarites, though the costumes named them as Mazorites. [1] [2] See also: Mazarites.
Xelatian homeworld 
Homeworld of the Xelatians. (Star Trek IV: The Voyage Home)
Zaranite homeworld 
Homeworld of the Zaranites. (Star Trek: The Motion Picture; Star Trek IV: The Voyage Home; Star Trek VI: The Undiscovered Country)

Other known members Edit

Algolian Homeworld 
Homeworld of the Algolians. (TNG: "Qpid")
Based on them having a seat on the Federation Archaeology Council.
Arbazan Homeworld 
Homeworld of the Arbazan. (DS9: "The Forsaken")
Based on an Arbazan holding the position of ambassador.
Homeworld of the Ardanans. (TOS: "The Cloud Minders")
Homeworld of the Benzites. (TNG: "Coming of Age")
Homeworld of the Betazoids. (TNG: "Haven")
Bolarus IX 
Homeworld of the Bolians. (TNG: "Qpid"; DS9: "The Forsaken")
Based on them also having a seat on the Federation Archaeology Council.
Babel reception

Ambassadors Sarek and Gav discuss Coridan's admission into the Federation in 2268

Homeworld of the Coridans. (TNG: "Sarek")
Efrosian homeworld 
Homeworld of the Efrosians. (Star Trek VI: The Undiscovered Country)
Based on one being Federation President.
Homeworld of the Haliians. (TNG: "Aquiel")
Hekaras II 
Homeworld of the Hekarans. (TNG: "Force of Nature")
Peliar Zel II 
Homeworld of the Peliar Zel natives. (TNG: "The Host")
Rigel IV 
Homeworld of the Rigellians. (Star Trek: The Motion Picture)
Homeworld of the Risians. (TNG: "Captain's Holiday")
Unnamed Federation planet 
Home to the unnamed alien ambassadors. (TOS: "Journey to Babel")
Unnamed Federation planet 
Home to the unnamed copper-skinned aliens. (TOS: "Journey to Babel")
An unfilmed scene from ENT: "Terra Prime" would have established these as the Ithenites mentioned in "Azati Prime". They were previously identified in Stardate magazine (issue 11) as the Dayen.
Unnamed Federation planet 
Home to the unnamed cross-dressing delegates. (TOS: "Journey to Babel")
Unnamed Federation planet 
Home to the unnamed female delegates. (TOS: "Journey to Babel")
Unnamed Federation planet 
Home to the unnamed purple-skinned aliens. (TOS: "Journey to Babel")
Unnamed Federation planet 
Home to the unnamed brown-skinned delegates. (TOS: "Journey to Babel")
Zakdorn Homeworld 
Homeworld of the Zakdorn. (TNG: "Peak Performance")
Zelonite Homeworld
Homeworld of the Zelonites. (Star Trek VI: The Undiscovered Country)
According to VOY: "The Voyager Conspiracy", Ktarians were officially "with the Federation", but it is not specified if they were members or allies.

Furthermore, Ithenite, Klingons, and Xindi were mentioned by Daniels as part of the Federation in a possible 26th century. (ENT: "Azati Prime")

Protectorates Edit


Regent Cuzar at the Evora's reception

Evora homeworld 
Homeworld of the Evora. (Star Trek: Insurrection)
According to a deleted scene from the end of "Insurrection", the Ba'ku planet was also to become a protectorate.
Haven was said to have a treaty with the Federation which required Starfleet to protect it, and thus may have been an official protectorate.

Colonies Edit

See Federation colonies.

The exact status of Federation colonies has never been clearly established. While due to the large amount of colonies it seems unlikely that they have full member status, it would be plausible to assume that they enjoy a status not unlike to that of Federation protectorates.

Proposed members Edit

Sisko locusts

Captain Benjamin Sisko stopping Bajor from joining the Federation

These following were in the process of gaining Federation member status as of the year indicated.

Angosia III (2366)
Homeworld of the Angosians. (TNG: "The Hunted")
Antede III (2365)
Homeworld of the Antedians. (TNG: "Manhunt")
Antica (2364)
Homeworld of the Anticans. (TNG: "Lonely Among Us")
Bajor (2373)
Homeworld of the Bajorans. (DS9: "Emissary")
Cairn homeworld (2370)
Homeworld of the Cairn. (TNG: "Dark Page")
Catulla (2269)
Homeworld of the Catullans. (TOS: "The Way to Eden")
Gideon (2268)
Homeworld of the Gideon and the Gideon Council. (TOS: "The Mark of Gideon")
Kesprytt III (2370)
Homeworld of the Kesprytt and the Kes and Prytt governments. (TNG: "Attached")
Selay (2364)
Homeworld of the Selay. (TNG: "Lonely Among Us")

Background informationEdit

In TOS: "Journey to Babel", set in 2268, the ambassadors of Federation planets attended the Babel Conference, at that time there were thirty-two ambassadors, suggesting there were at least thirty-two member worlds in the Federation at that time.

According to a dossier on the home page of Star Trek, in the alternate reality, the Federation had one hundred twenty member planets and seven hundred colonies in the 2250s. [3]

According to Star Trek: Star Charts (United Federation of Planets IV), in 2378, there were 183 members and 7,128 affiliates. The area of the Federation was eight thousand cubic light years. At the last census, in 2370, there were 985 billion individuals living in the Federation.

Aleek-Om was identified as a "Federation historian" in the Star Trek Concordance, possibly based on the script, suggesting Aurelia might be a member. Bilana III was also identified as a member in the Star Trek Encyclopedia and Star Trek: Star Charts.

"Magic to Make the Sanest Man Go Mad" introduced the idea of "Federation aligned species", though no examples were given.

Related topics Edit

External linksEdit

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