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As of December 2380, there were 154 member states of the United Federation of Planets, and Federation space spanned over 10,000 light years. (Template:N)
- See also Federation colonies.
Founding member states
The United Federation of Planets was founded in 2161 by the governments of United Earth, the Confederacy of Vulcan, the Andorian Empire, the United Planets of Tellar, and the Alpha Centauri Concordium, all of which were previously members of the Coalition of Planets. (Template:E; Template:E; Template:N; Template:N; Template:R)
- The novel Starfleet: Year One, published before Enterprise canonically confirmed the founding members of the Federation, gave eight founding worlds; Earth, Template:Planet, Andor and Tellar remained, Alpha Centauri was omitted and Osadj, Dedderai, Vobilin and, last to agree to join, Rigel IV, were added. While these extra worlds could still be early members of the Federation, the majority of sources, and canon, now rule them out as founding members.
- Similarly, the reference book Spaceflight Chronology lists Rigel as a founding member in addition to the five listed above. In addition, in that source Alpha Centauri is a system with an indigenous (though closely related to Human) population, not an Earth colony.
Members
A
B
| planet/system | state | species | admitted | notes |
|---|---|---|---|---|
| Bajor | Republic of Bajor | Bajoran | 2376/2384 | 2376 admission into the Federation depicted in Template:Dis. 2384 application acceptance depicted in The Path to 2409, with full admittance in 2393. |
| Benzar | Benzite | 2369 | Confirmed member in Articles of the Federation and Coming of Age | |
| Berengaria VII | Human colony | Confirmed member in Template:R | ||
| Beta Ophiuchi | Confirmed member in Star Trek Maps | |||
| Betazed | Fifth House of Betazed | Betazoid | 2273 | Confirmed member in Triangle: Imzadi II, details per Star Charts |
| Betelgeuse II | Betelgeusian | 2230 | Confirmed member in The Motion Picture | |
| Bilana III | Bilannan | Confirmed member in Template:R. | ||
| Binderia | Binderian | Template:N | ||
| Bolarus | Bolian | 23rd century | Confirmed in Template:Rpg | |
| Bre'el IV | Bre'ella | Confirmed member in Articles of the Federation | ||
| Buran | Burani | 2369 | Confirmed in Template:N | |
| Bynaus | Bynar | Confirmed member in 10 is Better Than 01 |
C
| planet/system | state | species | admitted | notes |
|---|---|---|---|---|
| Template:Planet | Cairn | Confirmed member in Template:N and Template:R. | ||
| Cait | Caitian | 2181 | Confirmed in Template:N, Template:R and Star Trek IV Sourcebook Update | |
| Candelar IV | Candelaran | - | Confirmed member in Template:N | |
| Catulla | Catullan | 2185 | Confirmed member in Template:R. | |
| Cestus III | Cestus III Colony | Human | 2271 | Confirmed in Template:R. |
| Chal | Klingon/Romulan Hybrid or Chalchaj'qmey | Confirmed member in Template:N | ||
| - | Clan Ru | Confirmed member in Template:N | ||
| Coridan III | People's Republic of Coridan | Coridanite | 2267 | Confirmed in Template:E, Template:R |
| Cygnet XIV | Cygnian | 2251 | Confirmed member in Template:R. |
D
| planet/system | state | species | admitted | notes |
|---|---|---|---|---|
| Damiano | Damiani | 2341 | Confirmed member in Articles of the Federation | |
| Danter | Danteri Empire | Danteri | Confirmed member in House of Cards | |
| Daran V/Kachissat | Shesshran | 2237 | Confirmed member in Star Trek Maps | |
| Dedderai | Dedderac | Confirmed member in Darkness and Starfleet: Year One | ||
| Delb II | Delbian | Confirmed member in Template:R | ||
| Deneb II | Details per The Worlds of the Federation | |||
| Delta IV | Deltan Union | Deltan | 2223 | Confirmed member in Star Trek IV Sourcebook Update and Star Trek Maps, Details per Star Charts |
| Delta Sigma IV | Bader, Dorset | Confirmed member in A Time to Love and A Time to Hate | ||
| Deneb IV | Bandi | Bandi | 2364 | Details per Star Charts |
| Deneb V | Commonwealth of Denebia | Denebian | 2259 | Details per Star Charts |
| Deneva | Deneva Colony | Human colony | Confirmed member in Template:N. | |
| Denobula Triaxa | Denobulan | 2180 | Confirmed member in In a Mirror, Darkly | |
| Djana | Djanai (including Inari) | Confirmed member in The Lost Years | ||
| Dramia | Dramian | Confirmed member in Template:R. |
E
| planet/system | state | species | admitted | notes |
|---|---|---|---|---|
| Earth | United Earth | Human | 2161 | Founding member in Template:N. |
| Eeiauo | Eeiauoan | Confirmed member in Template:N. | ||
| Edos | Edosian | Confirmed member in Star Trek Maps | ||
| Efros/Efros Delta/Atreos IV | Efrosian | Confirmed member in Star Trek IV Sourcebook Update | ||
| Ekos | Ekosian global federation | Ekosian | 2373 | Confirmed in Template:Rpg |
| Elas | Elasian | Late 24th Century | Confirmed member in Template:N. | |
| Evora | Evoran | 2375 | Confirmed in Template:N |
F
| planet/system | state | species | admitted | notes |
|---|---|---|---|---|
| Fillandia | Ariolo | Confirmed member in Star Trek IV Sourcebook Update |
G
| planet/system | state | species | admitted | notes |
|---|---|---|---|---|
| - | Galakhi | Confirmed member in Template:N. | ||
| Gemworld | Elaysian, Lipul | Confirmed member in Template:N. | ||
| Template:Planet (Delta Dorado) | Gideon Council | Gideonite | prior to 2378 | Confirmed member in Template:R. |
| Gnala | Gnalish | Confirmed member in Template:N. | ||
| Grazer | Grazerite | 2305 | Confirmed member in Template:N. | |
| - | Guidon Space Pontificate | Guidon | prior to 2363 | Confirmed member in Template:Ss. |
| Gullrey | Rey | Confirmed member in Template:N. |
H
| planet/system | state | species | admitted | notes |
|---|---|---|---|---|
| Halii | Haliian | Confirmed member in Template:E. | ||
| Hamal IV | Hamalki | Confirmed member in Template:N. | ||
| Hekaras II | Hekaran | Confirmed member in Template:E. | ||
| - | Hermat | Confirmed member in Template:N. | ||
| Huan | Huanni | Confirmed member in Template:N. |
I
| planet/system | state | species | admitted | notes |
|---|---|---|---|---|
| Igre | Igresh | before 2364 | Confirmed member in Template:Rpg. | |
| Izar | Izar Colony | Human | 2183 | Confirmed member in Template:R. |
J
| planet/system | state | species | admitted | notes |
|---|---|---|---|---|
| Janus VI | Horta | Confirmed member in Template:N. | ||
| Jezero | Jezero natives | before 2269 | Confirmed member in Template:N. | |
| Jotunheim | before 2270 | Confirmed member in Template:N. |
K
| planet/system | state | species | admitted | notes |
|---|---|---|---|---|
| K'norm | K'normian | Confirmed member in The Motion Picture | ||
| Kaferia | Kaferian | 2378 | Confirmed in Star Charts | |
| Kashet | Kasheeta | Confirmed member in Star Trek IV Sourcebook Update | ||
| Template:Planet, Kazar system | Kazarite | Confirmed member in The Motion Picture | ||
| Kerovi | Kerovian | Confirmed member in Template:N. Left the Federation in 2378. (Template:N) | ||
| Klaestron IV | Klaestron | 2378 | Confirmed in Star Charts | |
| Klingon | before 2769 | Confirmed member in Template:STO. Member planet or state not specified. | ||
| Koa (Mu Arae) | Koas | 2380 | Admission into the Federation depicted in Template:N. | |
| - | K'Vin Hegemony | K'Vin | 2260s | Confirmed member in Template:N. |
L
| planet/system | state | species | admitted | notes |
|---|---|---|---|---|
| - | Lendrin | 2370s | Confirmed member in Template:N. | |
| Lorillia | Lorillian | before 2381 | Confirmed member in Template:N. | |
| Lrru-Ir | Irriol Whole | Irriol | before 2379 | Confirmed member in Template:N. |
| Luna | Luna Colonies | Human | 2161 | Charter member at formation of the Federation in Template:R. |
| Lembatta Prime | by 2380 | Confirmed member in Template:N. |
M
| planet/system | state | species | admitted | notes |
|---|---|---|---|---|
| Magna Roma | Magna Roman | Confirmed member in The Captains' Honor | ||
| Template:Planet | Makkusian | Confirmed member in Template:Dis. | ||
| Mantilles | Confirmed member in Star Trek Maps | |||
| Marcos XII | Various, Federation colony | Confirmed member in Star Trek Maps, details per The Worlds of the Federation | ||
| Mars | Confederated Martian Colonies | Human | 2162 | Confirmed in Template:N |
| Medusa | Medusan | - Confirmed member in Star Trek Maps and Is There in Truth No Beauty? | ||
| Megara | Megarite | Confirmed member in The Motion Picture | ||
| Melkot | Melkot (Melkotian) | Confirmed member in The Worlds of the Federation | ||
| Menk | Commonwealth of Menk and Valakis | Menk and Valakian | 2236 | Confirmed member in Template:R. |
| Merak II | Merakan | Confirmed member in Star Trek Maps, details per The Worlds of the Federation | ||
| Monchezke | Monchezkin | before 2233 | Confirmed member in Template:Mn. |
N
| planet/system | state | species | admitted | notes |
|---|---|---|---|---|
| Nador | Nadorian | 2267 | Confirmed in Template:N. | |
| Napea | Napean | Confirmed member in Template:R. | ||
| Template:Planet | Nasat | before 2380 | Confirmed member in Template:N. | |
| New Paris | Human | before 2378 | Confirmed member in Template:R. | |
| New Romulus | Romulan Republic | Romulan | before 2769 | Confirmed member in Template:STO. |
| New Xannon | Xanno | 2229 | Confirmed in Template:N. | |
| New Xindus | Xindi Council | Xindi | 2311 | Confirmed member in Template:R. |
O
| planet/system | state | species | admitted | notes |
|---|---|---|---|---|
| Ontail (Ona) | Ontailian | Confirmed member in Template:N and TNG #68 | ||
| Oriki | Oriki | Confirmed member in Vulcan's Heart | ||
| Orodanga | Ithenite | Confirmed member in Journey to Babel | ||
| Osadj | Osadjani | Confirmed member in Starfleet: Year One |
P
| planet/system | state | species | admitted | notes |
|---|---|---|---|---|
| Pacifica | Selkie | before 2378 | Confirmed member in Template:R. | |
| Pahkwa Majoris | Pahkwa-thanh | 2360 | Confirmed member in Template:N. | |
| Pandril | Pandrilite | Confirmed member in Template:N. | ||
| Pangea | Human (Pangean) | Confirmed member in Template:N. | ||
| Peliar Zel II | Peliar | Confirmed member in The Host | ||
| Penzatti | Penzatti | Confirmed member in Vendetta | ||
| Phylos | Phylosian | Details per The Worlds of the Federation |
R
| planet/system | state | species | admitted | notes |
|---|---|---|---|---|
| Ramatis III | Ramatian | Confirmed member in Star Trek: Destiny: Gods of Night. | ||
| Regulus III | Regulan | Confirmed member in Template:R. | ||
| Regulus V | Regulan | Confirmed member in Template:R. | ||
| Rhaandarel (Rhaandaran) | Rhaandarite | Confirmed member in The Voyage Home. | ||
| (Beta) Rigel system | United Rigel Worlds and Colonies | Rigelian | 2164 | Joined in Template:N. |
| Risa | Risian Hedony | Risian | 2249 | Confirmed member in Captain's Holiday, Details per Star Charts |
S
| planet/system | state | species | admitted | notes |
|---|---|---|---|---|
| S'ti'ach'aas | S'ti'ach | Confirmed member in Template:N. | ||
| Sauria | Saurian | Confirmed member in The Motion Picture | ||
| Selene | Selenean | Confirmed member in Template:N. | ||
| Selelvia | Selelvian | Left the Federation in 2376. Confirmed former member in Template:N. | ||
| Sherman's Planet | Sherman's Planet Joint Administrative Territory | Human/Klingon | Also part of the Klingon Empire. Details per Template:R. | |
| Shamin/O'Ryan's Planet | Shamin | Confirmed member in The Motion Picture | ||
| Sigma Iotia II | Iotian | Confirmed member in The Lost Years | ||
| Ssan | Ssana | Confirmed member in Shadows on the Sun | ||
| Sulamid | Sulamid | before 2380 | Confirmed member in Template:N. |
T
| planet/system | state | species | admitted | notes |
|---|---|---|---|---|
| Tandar Prime | Tandaran | 2320s | Confirmed member in Template:N. | |
| Tau Ceti III | Kaferian | before 2378 | Confirmed member in Template:R. | |
| Tellar | United Planets of Tellar | Tellarite | 2161 | Confirmed founding member in Zero Hour |
| Terra Nova | Terra Nova Colony | Novan | 2178 | Confirmed member in Template:R. |
| Tessen III | Tessenite | Confirmed member in Template:R. | ||
| Template:Planet | Human (Tenaran) | Confirmed member in The Captains' Honor | ||
| Theta Kiokis II | Details per The Worlds of the Federation | |||
| Template:Planet | Tiburon | 2190 | Confirmed member in Template:N. and Star Trek Maps | |
| Triex | Triexian | Confirmed member in Template:N. | ||
| Trillius Prime (Trill) | Trill Symbiosis | Trill | 2285 | Confirmed member in Template:R. |
| Tyrellia | Tyrellian | Confirmed member in Template:R. |
U
| planet/system | state | species | admitted | notes |
|---|---|---|---|---|
| - | Ullian Free State | Ullian | Confirmed member in Template:N. | |
| Umoth VIII | Confirmed member in Template:R. |
V
| planet/system | state | species | admitted | notes |
|---|---|---|---|---|
| Valzhan | Valzhan | 2268 | Confirmed member in Template:Eb). | |
| Vega IX | Vega Colony | Humans | 2164 | Joined in Template:N. |
| Verdanis (Terratin) | Terra 10 | mutated Humans | before 2378 | Confirmed member in Template:R. |
| Vestios system | Vestian | 2310 | Confirmed member in Burning Dreams | |
| Vico V | before 2378 | Confirmed member in Template:R. | ||
| Vobilin | Vobilite | Confirmed member in Starfleet: Year One | ||
| Template:Planet | Vorgons | 2359 | Confirmed member in Template:N. | |
| Template:Planet | Confederacy of Vulcan | Vulcan | 2161 | Confirmed founding member in Template:N. |
X
| planet/system | state | species | admitted | notes |
|---|---|---|---|---|
| Xelata | Xelatian | Confirmed member in Template:Rpg. |
Y
| planet/system | state | species | admitted | notes |
|---|---|---|---|---|
| Yridia Prime | Yridian | before 2378 | Confirmed member in Template:R. |
Z
| planet/system | state | species | admitted | notes |
|---|---|---|---|---|
| Zadar IV | before 2378 | Confirmed member in Template:R. | ||
| Template:Planet | Zakdorn | 2344 | Confirmed in Template:N. | |
| Zalda (Zald) | Zaldan | 2280 | Confirmed in Template:N. | |
| Zaran II | Zaranite | Confirmed member in Template:Rpg. | ||
| Zytchin III | before 2378 | Confirmed member in Template:R. |