The Ullian homeworld is the home planet of the Ullians.

The Starship Enterprise-D visited the Ullian homeworld in 2368 to return a Ullian delegation after discovering Jev, part of the delegation, had committed acts of telepathic memory invasion against Enterprise crewmembers and citizens of worlds visited by the Ullians. Physicians from the homeworld contacted the Enterprise in order to assist the affected crew with their recovery. (TNG: "Violations")