The Cylon Sector is those parts of the Pocket Universe controlled by the robotic Cylons based on New Cylon.

Worlds in the Sector routinely see Humans targeted for genocidal extermination. Non-human organic sentients are restricted in their freedoms somewhat under Cylon rule.

The Cylon Sector is actually smaller than the New Shi'ar Imperium, the Systems Commonwealth, and the Sontaran Dominion and roughly the same size as the Interplanetary Neo-British Kingdom and the Kurgan Caliphate.