The Ilecom system was an inhabited star system.

In 2364, the Ilecom system reported that the Manheim Effect had been observed as the effect spread to places that were several thousand light years from the Vandor system where the effect originated. (TNG: "We'll Always Have Paris")

In 2371, the location of the Ilecom system was labeled in the star chart Data and Picard were studying in stellar cartography aboard the USS Enterprise-D. (Star Trek Generations, okudagram)