The Benecia Colony was a Federation colony on the planet Benecia.
In 2266, the Karidian Company of Players was to make its next stop at this colony after performing on Planet Q and the USS Enterprise. (TOS: "The Conscience of the King")
Spock once mentioned, in 2269, that the colony's medical facilities were "most primitive." (TOS: "Turnabout Intruder")
This colony was only mentioned in dialogue.