I've seen several episodes where planets have petitioned the Federation for membership, and still others where the Federation is watching a planet's development in anticipation for future membership; but I can't remember if any planet has been kicked out of the Federation. Have there been any?

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    SPOILER ALERT Andoria withdrew from the Federation in a recent series of novels. I haven't read them, but have looked at the blurbs on the back, so I can't name them, unfortunately. SPOILER FINISHED There was also a proposed DS9 storyline where Vulcan would leave the Federation. The Federation would be convinced that Vulcan had been taken over by the Founders, leading to a story-arc where it would be revealed that Vulcan just wanted out due to increasing paranoia about the Changelings. This was rewritten as Homefront and Paradise Lost. Tasha Yar's homeworld may be an example. Commented Mar 17, 2014 at 7:42
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    @James, that sounds like an answer...
    – AncientSwordRage
    Commented Mar 17, 2014 at 9:00
  • I don't feel comfortable making it an answer when I don't even know the name of the book I'm talking about. Commented Mar 17, 2014 at 13:00
  • Turkana IV withdrew but that's not quite the same as being kicked out. Commented Mar 17, 2014 at 16:45

3 Answers 3


Within the TV series and films, there are no instances of existing UFP members being ejected due to their actions although there is a mention of Turkana IV withdrawing their membership after a bitter civil war.

Additionally, certain planets were annexed during the Dominion War (such as Betazed) but their status as members remained and they operated with "governments in exile".

In order to find situations where planetary systems have left the UFP you need to start looking at the weird and wonderful EU book canon;


In the original plot for Deep Space 9's 'Homefront/Paradise Lost', back when it was going to be the season 3 finale, Vulcan was going to pull out of the Federation. http://en.memory-alpha.org/wiki/Homefront_(episode)#Background_Information (Just as I finished writing this, I just realised James Sheridan wrote this as a comment long before me, but to be honest, I think it will be every respondent's first thought on this question)

I could be mistaken but I think something like this happened with the Danteri from Star Trek: New Frontier. http://memory-beta.wikia.com/wiki/Danteri I remember them being a member of the Federation in the first book but apparently that is no longer the case, though I'm not sure if that was a retcon or such.

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    Thanks for the reply Sumbuddyyx, but I was looking for any members who had gotten kicked to the curb, got the boot, sent packing, ditched by the Federation.
    – Morgan
    Commented Mar 17, 2014 at 14:39

The Andorians were placed under an embargo by Baras Rodirya (posing as Ishan Anjar) during his term as Federation President. They withdrew from the Federation but rejoined after his involvement in a conspiracy to deny them a cure for a reproductive crisis was exposed. (The Fall, Peaceable Kingdoms)

Some worlds were denied membership in The Next Generation until they presumably improved.

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