Delta Darius is a star and star system, the location of planet Darius III. Delta Darius was in the portion of Federation space denoted as the Starfleet Intelligence sector 1, near Jallamora. The closest Starfleet starbase to this system in the 23rd century was Starbase 8, although there was a Starfleet Intelligence base in the system, at Darius III.

According to Starfleet Intelligence outpost maps, this system's coordinates are 0.34N 7.78W. (RPG reference: Star Fleet Intelligence Manual)