The Katcherians are an alien civilization native to a homeworld located somewhere in the galaxy's Alpha or Beta Quadrants. Katcherians were known to the Federation in the mid 24th century.

A Katcherian casino manager on planet Cathius IX was one of three men who allegedly beat Ensign Abraham Silver nearly to death. He later fled to Argelius II and reformed to a life of pacifism. (SCE - Tales from the Captain's Table short story: "An Easy Fast")