Una II was a planet located in the space of the galaxy's Beta Quadrant, the second planet in orbit of the Una star system. This Federation world is in the Orion sector of the Sirius sector block. Federation colonists have found peace and happiness on their planet, embracing a simple agrarian lifestyle and rejecting common conveniences such as replicators and hologram technology. Starfleet has established a supply space station near this world, to service nearby vessels and also to provide a line of defense for the world's population. (STO video game: Star Trek Online)

In the early 25th century, Klingon warriors sometimes attempted to raid this world, on occasion leading Starfleet to dispatch defensive forces. (STO mission: "Una System Patrol")