- For other uses, see Oan.
In an alternate reality, the Oans were a civilization of sentient humanoid lifeforms. In their reality, the Oans commanded great respect as an ancient, wise and powerful species. In a time-warped version of this reality, the Oans had been thwarted in attempts to reign in the malignant Imperial Planets government. (TOS - Legion of Super-Heroes comic: "Issue 2")
- The time travel-distortion caused an "evil" variation of reality that was similar in respects to Star Trek's mirror universe, but with elements of DC Comics characters. In particular, the Oans were, in unaltered history, the benefactors giving power to the power batteries of the Green Lantern Corps. The Legion's universe became crossed with the Star Trek universe due to a time distortion, so it is not clear if there is a Star Trek universe version of the Oans.