Federation members

In 2373, the United Federation of Planets consisted of at least 150 member planets, spread over 8,000 light years. 

Founding members
The United Federation of Planets was founded in 2161 by the following members:
 * Andoria : Homeworld of the Andorians and the Andorian Empire.
 * Earth : Homeworld of the Humans and United Earth.
 * Tellar Prime : Homeworld of the Tellarites.
 * Vulcan : Homeworld of the Vulcans and the Vulcan High Command.

Council members
The following are members of the Federation who are known to be on the Federation Council.
 * Arcadian homeworld : Homeworld of the Arcadians.
 * Ariolo homeworld : Homeworld of the Ariolo.
 * Bzzit Khaht homeworld : Homeworld of the Bzzit Khaht.
 * Caitian homeworld : Homeworld of the Caitians.
 * Delta IV : Homeworld of the Deltans.
 * Grazerite homeworld : Homeworld of the Grazerites.
 * Kasheeta homeworld : Homeworld of the Kasheeta.
 * Unnamed Federation planet : Home to the unnamed alien council members.


 * Xelatian homeworld : Homeworld of the Xelatians.
 * Zaranite homeworld : Homeworld of the Zaranites.

Other known members

 * Haliia : Howeworld of the Haliians.
 * Trillus Prime : Homeworld of the Trills. ;
 * Algolian Homeworld : Homeworld of the Algolians.


 * Arbazan Homeworld : Homeworld of the Arbazan.


 * Ardana : Homeworld of the Ardanans.
 * Benzar : Homeworld of the Benzites.
 * Betazed : Homeworld of the Betazoids.
 * Bolarus IX : Homeworld of the Bolians.


 * Coridan : Homeworld of the Coridans.
 * Efrosian homeworld : Homeworld of the Efrosians.


 * Hekaras II : Homeworld of the Hekarans.
 * Peliar Zel II : Homeworld of the Peliar Zel natives.
 * Rigel IV : Homeworld of the Rigellians.
 * Risa : Homeworld of the Risians.
 * Ktaris : Homeworld of the Ktarians.
 * Unnamed Federation planet : Home to the unnamed alien ambassadors.
 * Unnamed Federation planet : Home to the unnamed copper-skinned aliens.


 * Unnamed Federation planet : Home to the unnamed delegates.
 * Unnamed Federation planet : Home to the unnamed female delegates.
 * Unnamed Federation planet : Home to the unnamed purple-skinned aliens.
 * Unnamed Federation planet : Home to the unnamed robed delegates.
 * Zakdorn Homeworld : Homeworld of the Zakdorn.

Protectorates

 * Evora Homeworld : Homeworld of the Evora.

Colonies
See Federation colonies.

Proposed members
These following were in the process of gaining Federation member status as of the year indicated.
 * Angosia III (2366): Homeworld of the Angosians.
 * Antede III (2365): Homeworld of the Antedeans.
 * Antica (2364): Homeworld of the Anticans.
 * Bajor (2377): Homeworld of the Bajorans.
 * Cairn Homeworld (2370): Homeworld of the Cairn.
 * Catulla (2269): Homeworld of the Catullans.
 * Gideon (2268): Homeworld of the Gideon and the Gideon Council.
 * Kesprytt III (2370): Homeworld of the Kesprytt and the Kes and Prytt governments.
 * Selay (2364): Homeworld of the Selay.

Background information
In, set in 2268, the ambassadors of Federation planets attended the Babel Conference, at that time there were 32 ambassadors, suggesting there were at least 32 planets in the Federation at that time.

According to a dossier on the home page of, in the alternate reality, the Federation had 120 member planets and 700 colonies in the 2250s. 

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 8,000 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.

Related topics

 * Federation colonies
 * Species with representatives in Starfleet
 * Coalition of Planets