"Many similar universes co-exist in the same space, but in an infinite number of different dimensions! There's no limit to the variations..." - Superboy (Superboy No. 117, Dec. 1964)

This site is dedicated to the original Legion of Super-Heroes, yet there have been other versions of the futuristic team; alternate reality counterparts have appeared both before, during and after the Silver Age of the Superman Family. These can be divided into three main types: