Federation Members

Listed in order of joining:

1. United Earth
   • Joined: August 12, 2161
2. Confederacy of Vulcan
   • Joined: August 12, 2161
3. Andorian Empire
   • Joined: August 12, 2161
   • Withdrew: 2382
   • Rejoined: 2385
4. United Planets of Tellar
   • Joined: August 12, 2161
5. Alpha Centauri Concordium
   • Joined: August 12, 2161
6. Confederated Martian Colonies
   • Joined: 2162 (ENT Novel: A Choice of Futures)
7. Vega Colony
   • Joined: 2164 (ENT Novel: Tower of Babel)
   • Former United Earth colony
8. United Worlds and Colonies of Rigel
   • Joined: 2164 (ENT Novel: Tower of Babel)
9. Arken II
   • Joined: Early 2165 (ENT Novel: Uncertain Logic)
   • Former Andorian Empire subject world
10. Ithen
    • Joined: October 2165 (ENT Novel: Patterns of Interference)
11. Risian Hedony
    • Joined: late 22nd Century
12. Camor V
    • Joined: By 2200s (TNG Novel: Genesis Wave, Part I)
13. Deltan Union
    • Joined: By 2200s (TNG Novel: Genesis Wave, Part I)
14. Trill
    • Joined: By early-23rd Century
15. Argelius
    • Joined: 2240s/2250s (TOS Novel: Burning Dreams)
16. Valzhan
    • Joined: By mid-23rd Century
17. Axanar
    • Joined: After 2251, by 2260s
18. Alpha Proxima II
    • Joined: By 2260s
    • Former United Earth colony
19. Altair Colony
    • Joined: By 2260s
    • Former United Earth colony
20. Arcturus
    • Joined: By 2260s
21. Aurelia
    • Joined: By 2260s
22. Cait
    • Joined: By 2260s
    • Irregular participation
23. Cygnet
    • Joined: By 2260s
24. Denobula
    • Joined: By 2260s
25. Izar
    • Joined: By 2260s
    • Former United Earth colony
26. Makus III
    • Joined: By 2260s
27. Medusan
    • Joined: By 2260s
28. Plutocracy of Ardana
    • Joined: By 2260s
    • Withdrew: 2269
    • Rejoined: By 2370s
29. Ramatis III
    • Joined: By 2260s
30. Regulus
    • Joined: By 2260s
31. Sauria
    • Joined: By 2260s
32. Scoridia
    • Joined: By 2260s
33. Sulamid
    • Joined: By 2260s
34. Terra Nova
    • Joined: By 2260s
35. Tiburon
    • Joined: By 2260s
36. People's Republic of Coridan
    • Joined: 2267
37. Janus VI
    • Joined: After 2267
38. Aaamazzara
    • Joined: By 2270s
39. Betelgeusian Argosies
    • Joined: By 2270s
40. Kazar
    • Joined: By 2270s
41. Rhaandarel
    • Joined: By 2270s
42. Zaranai
    • Joined: By 2270s
43. Lorina
    • Joined: After 2273 (TOS Novel: Ex Machina)
44. Bolias
    • Joined: By 2280s
45. Efros
    • Joined: By 2280s
46. Kashet
    • Joined: By 2280s
47. Kyppr
    • Joined: By 2280s (VOY Novel: Acts of Contrition)
48. Pacifica
    • Joined: By 2280s (implicit by TNG Novel: Genesis Wave, Part I)
49. Huan
    • Joined: 2293
50. Betazed
    • Joined: By 2300s (TLE Novel: Cast No Shadow)
51. Vestios
    • Joined: 2310 (TOS Novel: Burning Dreams)
52. Beta Antares IV
    • Joined: By 2311
53. Lorillia
    • Joined: After 2311, By 2381
54. Deneva
    • Joined: By early-24th Century
    • Former United Earth colony
55. Gnala
    • Joined: By early-24th Century
56. Pythagos Clans
    • Joined: By early-24th Century
57. Tandar Prime
    • Joined: By 2320s
58. Zalda
    • Joined: 2330s-2340s
59. Alonis
    • Joined: 2336
60. Kerovi
    • Joined: c.2340
61. Oriki
    • Joined: 2340s-2350s
62. Candelar IV
    • Joined: 2350s
63. Cestus III
    • Joined: By mid-24th Century
    • Former Federation colony
64. Dedderei
    • Joined: By mid-24th Century
65. Elas
    • Joined: By mid-24th Century
66. Gemworld
    • Joined: By mid-24th Century
67. Grazer
    • Joined: By mid-24th Century
68. Guidon Pontificate
    • Joined: By mid-24th Century
69. Hermat Directorate
    • Joined: By mid-24th Century
70. Magna Roma
    • Joined: By mid-24th Century
71. Ochat
    • Joined: By mid-24th Century
72. Pandril
    • Joined: By mid-24th Century
73. Peliar Zel
    • Joined: By mid-24th Century
74. Selene
    • Joined: By mid-24th Century
75. Sigma Iotia II
    • Joined: By mid-24th Century
76. Tessen III
    • Joined: By mid-24th Century
77. Troyius
    • Joined: By mid-24th Century
78. Xindi Diaspora
    • Joined: By mid-24th Century
79. Pahkwa
    • Joined: 2360
80. Bynaus
    • Joined: After 2364, by 2374 (TNG: "11001001"; SCE Short Story: "10 is Better Than 01")
81. Benzar
    • Joined: After 2365, by 2374
82. Damiano
    • Joined: 2371
83. Skorr
    • Joined: After 2269, by 2376 (TAS: "The Jihad"; DS9 Novel: Mission Gamma: Twilight)
84. Lendrin
    • Joined: After 2371, by 2378
85. Andros III
    • Joined: By late-24th Century
86. Antede III
    • Joined: By late-24th Century
87. Arbaza
    • Joined: By late-24th Century
88. Asario
    • Joined: By late-24th Century
89. Atrea IV
    • Joined: By late-24th Century
90. Bilana III
    • Joined: By late-24th Century
91. Bre’el IV
    • Joined: By late-24th Century
92. Cairn
    • Joined: By late-24th Century
93. Caldos II
    • Joined: By late-24th Century
    • Former Federation colony
94. Carnegie
    • Joined: By late-24th Century
    • Former Federation colony
95. Commonwealth of Denebia
    • Joined: By late-24th Century
96. Delb II
    • Joined: By late-24th Century
97. Delta Sigma IV
    • Joined: By late-24th Century
98. Gallamite
    • Joined: By late-24th Century
99. Grilasdixraksirvek
    • Joined: By late-24th Century
100. Hekaras II
     • Joined: By late-24th Century
101. Icor IX
     • Joined: By late-24th Century
102. Inferna Prime
     • Joined: By late-24th Century
103. Ktar
     • Joined: By late-24th Century
104. Meldrar I
     • Joined: By late-24th Century
105. Napea
     • Joined: By late-24th Century
106. Nasat
     • Joined: By late-24th Century
107. Parnasi
     • Joined: By late-24th Century
108. Pentam V
     • Joined: By late-24th Century
109. Triex
     • Joined: By late-24th Century
110. Tyrellia
     • Joined: By late-24th Century
111. Visalayan
     • Joined: By late-24th Century (TNG Novel: A Time to Die)
112. Ysa
     • Joined: By late-24th Century
113. Zakdorn
     • Joined: By late-24th Century
114. Zanri
     • Joined: By late-24th Century
115. Ona
     • 152nd member
     • Joined: Mid-2373 (TNG Novel: A Time to Be Born, A Time to Die)
116. Evora
     • 153rd member
       • Over 150 members by October 2373 (Star Trek: First Contact)
     • Joined: 2375
117. Third Republic of Bajor
     • 154th member
     • Joined: September 29, 2376
118. Koa
     • 155th member (Novel: Articles of the Federation)
     • Joined: 2380