R'Riss was a planet located somewhere in the space of the galaxy's Alpha or Beta Quadrants, in orbit of the Zeta Kiladen star system, at coordinates 0.98N 0.35E. R'Riss was homeworld to the non-humanoid R'Riss natives' civilization.

By the mid 23rd century, R'Riss was under Prime Directive protection from the Federation. By reference stardate 2/2306.01 in the 2280s, the world had a population of around 3.75 billion individuals. (FASA RPG module: The Federation)