Federation Members
Listed in order of joining:
- United Earth
- Confederacy of Vulcan
- Joined: August 12, 2161
- Comprising Nevasa system, Cor Caroli system, Nisus, Sigma Draconis V, Trilan
- Largely Vulcan state
- Andorian Empire
- United Planets of Tellar
- Joined: August 12, 2161
- Comprising Tellar Prime, Kera Phinda, Brantik, Hakon, Maeglin, Iota Pegasi
- Largely Tellarite state
- Alpha Centauri Concordium
- Joined: August 12, 2161
- Comprising Alpha Centauri system
- Largely Human state
- Confederated Martian Colonies
- Joined: 2162 (ENT Novel: A Choice of Futures)
- Comprising Mars
- Largely Human and Tellarite state
- Vega Colony
- Joined: 2164 (ENT Novel: Tower of Babel)
- Former United Earth colony
- Comprising Vega IX
- Largely Human state
- United Worlds and Colonies of Rigel
- Arken II
- Joined: 2165 (ENT Novel: Uncertain Logic)
- Former Andorian Empire subject world
- Largely Arkenite state
- Ithen
- Joined: October 2165 (ENT Novel: Patterns of Interference)
- Largely Ithenite state
- Risian Hedony
- Camor V
- Joined: By 2200s (TNG Novel: Genesis Wave, Part I)
- Largely Camorite state
- Deltan Union
- Joined: By 2200s (TNG Novel: Genesis Wave, Part I)
- Comprising Dhei, Cinera, Seyaa, Brannik IV
- Largely Deltan state
- Trill
- Joined: By early-23rd Century
- Comprising Trill, Sappora VIII, Shal Tul
- Largely Trill state
- Argelius
- Joined: 2240s/2250s (TOS Novel: Burning Dreams)
- Largely Argelian state
- Valzhan
- Joined: By mid-23rd Century
- Largely Valzhan state
- Axanar
- Joined: After 2251, by 2260s
- Largely Axanar state
- Alpha Proxima II
- Joined: By 2260s
- Former United Earth colony
- Largely Human state
- Arcturus
- Joined: By 2260s
- Largely Arcturian state
- Plutocracy of Ardana
- Aurelia
- Joined: By 2260s
- Largely Aurelian state
- Cait
- Joined: By 2260s
- Irregular participation
- Comprising Cait, Kirisha IV
- Largely Caitian state
- Cygnet
- Joined: By 2260s
- Comprising Cygnet XII, Cygnet IV, Cygnet VIII
- Largely Cygnian state
- Denobula
- Joined: By 2260s
- Comprising Denobula, Teerza Prime, Fellebia, Matalas
- Largely Denobulan state
- Izar
- Joined: By 2260s
- Former United Earth colony
- Largely Human state
- Makus III
- Joined: By 2260s
- Largely Makusian state
- Medusan
- Joined: By 2260s
- Ramatis III
- Joined: By 2260s
- Largely Ramatis state
- Regulus
- Joined: By 2260s
- Comprising Regulus II, Regulus III, Regulus V
- Native species include Regulan, Veliki; significant immigrant populations include Caitian, Human
- Sauria
- Joined: By 2260s
- Largely Saurian state
- Scoridia
- Joined: By 2260s
- Largely Scoridian state
- Sulamid
- Joined: By 2260s
- Largely Sulamid state
- Tiburon
- Joined: By 2260s
- Largely Tiburonian state
- People's Republic of Coridan
- Joined: 2267
- Comprising Coridan
- Largely Coridanite state
- Janus VI
- Joined: After 2267
- Largely Horta state
- Aaamazzara
- Joined: By 2270s
- Largely Therbian state
- Betelgeuse II
- Joined: By 2270s
- Largely Betelgeusian state
- Kazar
- Joined: By 2270s
- Largely Kazarite state
- Rhaandarel
- Joined: By 2270s
- Largely Rhaandarite state
- Zaranai
- Joined: By 2270s
- Largely Zaranite state
- Bole
- Joined: By 2280s
- Comprising Bolarus IX, Myrmidon
- Largely Bolian state
- Efros
- Joined: By 2280s
- Largely Efrosian state
- Kashet
- Joined: By 2280s
- Largely Kasheeta state
- Kyppr
- Joined: By 2280s (VOY Novel: Acts of Contrition)
- Pacifica
- Joined: By 2280s (implicit by TNG Novel: Genesis Wave, Part I)
- Largely Selkie state
- Huan
- Joined: 2293
- Largely Huanni state
- Betazed
- Vestios
- Joined: 2310 (TOS Novel: Burning Dreams)
- Comprising Vestios Prime, Vestios II, Vestios V
- Largely Vestian state
- Beta Antares IV
- Joined: By 2311
- Lorillia
- Joined: After 2311, By 2381
- Largely Lorillian state
- Deneva
- Joined: By early-24th Century
- Former United Earth colony
- Comprised of Deneva, Ingraham B
- Largely Human state
- Gnala
- Joined: By early-24th Century
- Largely Gnalish state
- Pythagos Clans
- Joined: By early-24th Century
- Tandar Prime
- Joined: By 2320s
- Comprising Tandar Prime, Pyrellia, Kemsar Colony
- Largely Tandaran state
- Zalda
- Joined: 2330s-2340s
- Comprised of Zalda, Ricktor Prime
- Alonis
- Joined: 2336
- Largely Alonis state
- Oriki
- Joined: 2340s-2350s
- Largely Oriki state
- Candelar IV
- Joined: 2350s
- Largely Candelarian state
- Cestus III
- Joined: By mid-24th Century
- Former Federation colony
- Dedderei
- Joined: By mid-24th Century
- Largely Dedderac state
- Elas
- Joined: By mid-24th Century
- Largely Elasian state
- Gemworld
- Grazer
- Joined: By mid-24th Century
- Largely Grazerite state
- Hermat Directorate
- Joined: By mid-24th Century
- Comprised of Hermat, Amphibalus III
- Largely Hermat state
- Ochat
- Joined: By mid-24th Century
- Largely Ochati state
- Pandril
- Joined: By mid-24th Century
- Largely Pandrilite state
- Peliar Zel
- Joined: By mid-24th Century
- Largely Peliar state
- Selene
- Joined: By mid-24th Century
- Largely Selenean state
- Sigma Iotia II
- Joined: By mid-24th Century
- Largely Iotian state
- Tessen III
- Joined: By mid-24th Century
- Largely Tessenite state
- Troyius
- Joined: By mid-24th Century
- Largely Troyian state
- Xindi Diaspora
- Joined: By mid-24th Century
- Comprised of New Xindus, Azati Prime, Calindra
- Largely Xindi state
- Pahkwa
- Joined: 2360
- Largely Pahkwa-thanh state
- Bynaus
- Joined: After 2364, By 2375
- Largely Bynar state
- Benzar
- Joined: After 2365, by 2374
- Largely Benzite state
- Damiano
- Joined: 2371
- Largely Damiani state
- Lendrin
- Joined: After 2371, by 2378
- Largely Lendrin state
- Andros III
- Joined: By late-24th Century
- Largely Androsian state
- Antede III
- Joined: By late-24th Century
- Largely Antedean state
- Arbaza
- Joined: By late-24th Century
- Largely Arbazan state
- Asario
- Joined: By late-24th Century
- Largely Asarion state
- Atrea IV
- Joined: By late-24th Century
- Largely Atrean state
- Bilana III
- Joined: By late-24th Century
- Largely Bilanan state
- Bre’el IV
- Joined: By late-24th Century
- Largely Bre'ella state
- Cairn
- Joined: By late-24th Century
- Largely Cairn state
- Caldos II
- Joined: By late-24th Century
- Former Federation colony
- Carnegie
- Joined: By late-24th Century
- Former Federation colony
- Commonwealth of Denebia
- Joined: By late-24th Century
- Largely Denebian state
- Delb II
- Joined: By late-24th Century
- Largely Delbian state
- Delta Sigma IV
- Gallamite
- Joined: By late-24th Century
- Grilasdixraksirvek
- Joined: By late-24th Century
- Largely Antarean state
- Hekaras II
- Joined: By late-24th Century
- Largely Hekaran state
- Icor IX
- Joined: By late-24th Century
- Largely Icorian state
- Inferna Prime
- Joined: By late-24th Century
- Ktar
- Joined: By late-24th Century
- Largely Ktarian state
- Magna Roma
- Joined: By mid-24th Century
- Preserver transplant world
- Largely Magna Roman state
- Meldrar I
- Joined: By late-24th Century
- Largely Meldrarae state
- Napea
- Joined: By late-24th Century
- Largely Napean state
- Nasat
- Parnasi
- Joined: By late-24th Century
- Pentam V
- Joined: By late-24th Century
- Largely Pentamian state
- Triex
- Joined: By late-24th Century
- Largely Triexian state
- Tyrellia
- Joined: By late-24th Century
- Largely Tyrellian state
- Ysa
- Joined: By late-24th Century
- Zakdorn
- Zanri
- Joined: By late-24th Century
- Evora
- 152nd member
- Over 150 members by October 2373 (First Contact)
- Three given as members between then and 155th
- Joined: 2375
- Largely Evoran state
- 152nd member
- Ontail
- 153rd member
- Joined: 2375
- Largely Ontailian state
- Third Republic of Bajor
- 154th member
- Joined: September 29, 2376
- Comprised of Bajor, Andros, Dreon VIII, Free Haven, Golana, Prophet’s Landing, Valo, Velestral
- Largely Bajoran state
- Koa
- 155th member (Novel: Articles of the Federation)
- Joined: 2380
- Largely Koas state