Federation Members

• Member states of the United Federation of Planets
  • Listed in order of joining
  • List does not include Federation protectorates
• Known membership counts
  • 10 member states as of March 2166 (ENT Novel: Patterns of Interference)
  • 82 member states as of 2248 (DIS Novel: The Way to the Stars)
  • Over 100 member states as of January 2266 (VAN Novel: Reap the Whirlwind)
  • Over 150 member states as of October 2373 (First Contact)
  • 154 member states as of May 2380 (Novel: Articles of the Federation)
  • 155 member states as of December 2380 (Novel: Articles of the Federation)

Members

1. United Earth
   • 1st member
   • Joined: August 12, 2161
2. Confederacy of Vulcan
   • 2nd member
   • Joined: August 12, 2161
3. Andorian Empire
   • 3rd member
   • Joined: August 12, 2161
   • Withdrew: 2382
   • Rejoined: 2385
4. United Planets of Tellar
   • 4th member
   • Joined: August 12, 2161
5. Alpha Centauri Concordium
   • 5th member
   • Joined: August 12, 2161
6. Confederated Martian Colonies
   • 6th member (ENT Novel: A Choice of Futures)
   • Joined: 2162 (ENT Novel: A Choice of Futures)
7. Vega Colony
   • 7th member (ENT Novel: Tower of Babel)
   • Joined: 2164 (ENT Novel: Tower of Babel)
   • Former United Earth colony
8. United Worlds and Colonies of Rigel
   • 8th member (ENT Novel: Tower of Babel)
   • Joined: 2164 (ENT Novel: Tower of Babel)
9. Arken II
   • 9th member (ENT Novel: Uncertain Logic)
   • Joined: Early 2165 (ENT Novel: Uncertain Logic)
   • Former Andorian Empire subject world
10. Ithen
    • 10th member (ENT Novel: Patterns of Interference)
    • Joined: October 2165 (ENT Novel: Patterns of Interference)
11. Vobilin
    • Joined: 2160s-70s (SGR Novel: The Valiant)
      • Presumptive; Vobilites were one of the first supporters of the UFP per text
12. Izar
    • Joined: 2183 (Star Trek: Star Charts)
    • Former United Earth colony
13. Osadj
    • Joined: 2190 (Novel: Starfleet: Year One)
14. Risian Hedony
    • Joined: late 22nd Century
15. Camor V
    • Joined: By 2200s (TNG Novel: Genesis Wave, Part I)
16. Deltan Union
    • Joined: By 2200s (TNG Novel: Genesis Wave, Part I)
17. Trillius Prime
    • Joined: By 2230s (Novel: Articles of the Federation)
18. Argelius
    • Joined: 2240s/2250s (TOS Novel: Burning Dreams)
19. Arixus
    • Joined: By 2248 (DIS Novel: The Way to the Stars)
20. Bolias
    • Joined: By 2248 (DIS Novel: The Way to the Stars)
21. Elisurian homeworld
    • Joined: By 2248 (DIS Novel: The Way to the Stars)
22. Ri'tis
    • Joined: By 2248 (DIS Novel: The Way to the Stars)
23. Axanar
    • Joined: After 2251, by 2260s
24. Regulus
    • Joined: By 2254 (TOS: "The Cage")
25. Lembatta Prime
    • Joined: By 2259 (SNW: "Under the Cloak of War"; Novel: Articles of the Federation)
26. Osnullus homeworld
    • Joined: By 2259 (DIS: "Ad Astra per Aspera")
27. Makus III
    • Joined: By 2262 (TOS Novel: The Captain's Oath)
28. Altair Colony
    • Joined: By 2260s
    • Former United Earth colony
29. Antares Corona Worlds
    • Joined: By 2260s (TOS Novel: Prime Directive; TNG Novel: A Time for War, A Time for Peace)
30. Arcturus
    • Joined: By 2260s
31. Aurelia
    • Joined: By 2260s
32. Cygnet XIV
    • Joined: By 2260s (TOS Novel: The Captain's Oath)
33. Denobula
    • Joined: By 2260s
34. Plutocracy of Ardana
    • Joined: By 2260s
    • Withdrew: 2269
    • Rejoined: By 2370s
35. Ramatis III
    • Joined: By 2260s
36. Regulus (distant)
    • Joined: By 2260s (DIS Novel: Distant Measures)
37. Sauria
    • Joined: By 2260s
38. Scoridia
    • Joined: By 2260s
39. Sulamid
    • Joined: By 2260s
40. Terra Nova
    • Joined: By 2260s
41. Tiburon
    • Joined: By 2260s
42. Aulac
    • Joined: Mid-2260s (TOS Novel: The Captain's Oath)
43. Alpha Proxima II
    • Joined: By 2266 (BatB Novel: The First Artifact)
    • Former United Earth colony (BatB Novel: The First Artifact)
44. People's Republic of Coridan
    • Joined: 2267 (TOS: "Journey to Babel")
45. Janus VI
    • Joined: After 2267
46. Valzhan
    • Joined: After 2258, by 2268 (SCE Short Story: "Where Time Stands Still")
47. Eeiauo
    • Joined: By 2268 (TOS Novel: Uhura's Song)
48. Cait
    • Joined: By 2269
    • Irregular participation
49. Aaamazzara
    • Joined: By 2270s
50. Betelgeusian Argosies
    • Joined: By 2270s
51. K'normia
    • Joined: By 2270s (Star Trek: The Motion Picture)
52. Kazar
    • Joined: By 2270s (Star Trek: The Motion Picture)
53. Rhaandarel
    • Joined: By 2270s (Star Trek IV: The Voyage Home)
54. Zaranai
    • Joined: By 2270s
55. Lorina
    • Joined: After 2273 (TOS Novel: Ex Machina)
56. Delta Sigma IV
    • Joined: 2278 (TNG Novel: A Time to Love)
      • 2370s per Articles of the Federation, but conflicts with significant plot points in above
57. Kaferia
    • Joined: After 2164, by 2279 (ENT Novel: Tower of Babel; TOS Novel: Living Memory)
58. Verdanis
    • Joined: By late 23rd century (Novel: The Fire and the Rose)
59. Efros Delta
    • Joined: By 2280s
60. Kashet
    • Joined: By 2280s
61. Kyppr
    • Joined: By 2280s (VOY Novel: Acts of Contrition)
62. Pacifica
    • Joined: By 2280s (implicit by TNG Novel: Genesis Wave, Part I)
63. Huan
    • Joined: 2293
64. Betazed
    • Joined: By 2300s (TLE Novel: Cast No Shadow)
65. Vestios
    • Joined: 2310 (TOS Novel: Burning Dreams)
66. Beta Antares IV
    • Joined: By 2311
67. Lorillia
    • Joined: After 2311, By 2381 (TLE Novel: Serpents Among the Ruins; Destiny Novel: Lost Souls)
68. Deneva
    • Joined: By early-24th Century
    • Former United Earth colony
69. Gnala
    • Joined: By early-24th Century
70. Pythagos Clans
    • Joined: By early-24th Century
71. Tandar Prime
    • Joined: By 2320s
72. Binderia
    • Joined: By 2330s (SGR Novel: Gauntlet)
73. Alonis
    • Joined: c.2335
74. Kerovi
    • Joined: c.2340
    • Withdrew: 2378 (VOY Novel: Full Circle)
75. Zalda
    • Joined: 2340s (Novel: A Singular Destiny)
76. Oriki
    • Joined: 2340s-2350s
77. Penzatti
    • Joined: Late 2340s (TNG Novel: Vendetta)
    • Rendered uninhabitable October 2367 by Borg attack; survivors relocated (TNG Novel: Vendetta)
78. Candelar IV
    • Joined: 2350s
79. Berellian homeworld
    • Joined: By mid-24th Century (TNG: "Redemption II"; Novel: Articles of the Federation)
80. Cestus III
    • Joined: By mid-24th Century
    • Former Federation colony
81. Dedderei
    • Joined: By mid-24th Century
82. Grazer
    • Joined: By mid-24th Century
83. Hermat Directorate
    • Joined: By mid-24th Century
84. Kostolain
    • Joined: By mid-24th Century
85. Ochat
    • Joined: By mid-24th Century
86. Pandril
    • Joined: By mid-24th Century
87. Peliar Zel
    • Joined: By mid-24th Century (TNG: "The Host")
88. Selene
    • Joined: By mid-24th Century
89. Sigma Iotia II
    • Joined: By mid-24th Century
90. Tessen III
    • Joined: By mid-24th Century
91. Troyius
    • Joined: By mid-24th Century
92. Xindi Diaspora
    • Joined: By mid-24th Century
93. Danteri Empire
    • Joined: After c.2353, by 2373 (NF Novel: House of Cards)
94. Gemworld
    • Joined: By 2355 (DS9 Novel: Lesser Evil)
95. Magna Roma
    • Joined: By 2360s (Novel: The Fall: Poisoned Chalice)
96. Pahkwa
    • Joined: 2360
97. Guidon Pontificate
    • Joined: By 2363 (TNE Short Story: "Meet with Triumph and Disaster")
98. Halii
    • Joined: By 2369 (TNG: "Aquiel")
99. Nasat
    • Joined: By 2369 (SCE Short Story: "Balance of Nature")
100. Hekaras II
     • Joined: By 2370 (TNG: "Force of Nature")
101. Bynaus
     • Joined: After 2364, by 2374 (TNG: "11001001"; SCE Short Story: "10 is Better Than 01")
102. Benzar
     • Joined: After 2365, by 2374 (TNG: "A Matter of Honor"; DS9: "The Reckoning"; Novel: Articles of the Federation)
103. Skorr
     • Joined: After 2269, by 2376 (TAS: "The Jihad"; DS9 Novel: Mission Gamma: Twilight)
104. Deneb IV
     • Joined: After 2364, by 2378 (TNG: "Encounter at Farpoint"; TNG Novel: A Time to Love, A Time to Hate)
105. Lendrin homeworld
     • Joined: After 2371, by 2378 (VOY Novel: Children of the Storm)
106. Andros III
     • Joined: By late-24th Century (DS9: "In the Cards")
107. Antede III
     • Joined: By late-24th Century (Novel: Articles of the Federation)
108. Arbaza
     • Joined: By late-24th Century (DS9: "The Forsaken")
109. Asario
     • Joined: By late-24th Century
110. Atrea IV
     • Joined: By late-24th Century
111. Bilana III
     • Joined: By late-24th Century (Star Trek Encyclopedia)
112. Bre'el IV
     • Joined: By late-24th Century (TNG: "Deja Q"; Novel: Articles of the Federation)
113. Caldos II
     • Joined: By late-24th Century
     • Former Federation colony
114. Carnegie
     • Joined: By late-24th Century
     • Former Federation colony
115. Corazonia
     • Joined: By late-24th Century (LD: "In the Cradle of Vexilon")
116. Delb II
     • Joined: By late-24th Century (TNG: "The Drumhead")
117. Elas
     • Joined: By late-24th Century (Destiny Novel: Lost Souls)
118. Gallamite homeworld
     • Joined: By late-24th Century
119. Gelrak V
     • Joined: By late-24th Century (LD: "Temporal Edict")
120. Icor IX
     • Joined: By late-24th Century
121. Inferna Prime
     • Joined: By late-24th Century
122. Ktar
     • Joined: By late-24th Century
123. Meldrar I
     • Joined: By late-24th Century
124. Napea
     • Joined: By late-24th Century
125. Pangea
     • Joined: By late-24th Century (Novel: Articles of the Federation)
126. Parnasi
     • Joined: By late-24th Century
127. Pentam V
     • Joined: By late-24th Century
128. S'ti'ach'aas
     • Joined: By late-24th Century (TTN Novel: Orion's Hounds)
129. Taurus III
     • Joined: By late-24th Century (Novel: Articles of the Federation)
130. Triex
     • Joined: By late-24th Century
131. Tyrellia
     • Joined: By late-24th Century
132. Visalayan
     • Joined: By late-24th Century (TNG Novel: A Time to Die)
133. Ysa
     • Joined: By late-24th Century
134. Zakdorn
     • Joined: By late-24th Century
135. Zanri
     • Joined: By late-24th Century
136. Damiano
     • 149th member
     • Joined: 2371 (TNG Comic: "Perchance to Dream")
       • Formerly Federation protectorate
137. Cairn
     • 150th member
     • Joined: Early 2370s (Novel: Articles of the Federation)
138. Ullian Free State
     • Joined: By 2373 (S31 Novel: Rogue)
139. T'hirada
     • 151st member
     • Joined: 2373 (TNG Novel: Resistance)
140. Ona
     • 152nd member
       • Over 150 members by October 2373 (Star Trek: First Contact)
     • Joined: Mid-2373 (TNG Novel: A Time to Be Born, A Time to Die)
141. Third Republic of Bajor
     • 153rd member
     • Joined: September 29, 2376 (DS9 Novel: Unity)
142. Evora
     • 154th member
     • Joined: 2377 (Star Trek: Insurrection; SCE Short Story: "Past Life"; Novel: Articles of the Federation)
       • Formerly Federation protectorate
143. Koa
     • 155th member (Novel: Articles of the Federation)
     • Joined: Late December 2380 (Novel: Articles of the Federation)