The Tenarus Cluster was a star cluster in the Delta Quadrant, located near the Hanon system.

In the 2370s, this region was controlled by the Kazon-Nistrim. In late 2372, the Kazon Teirna plotted a course for the USS Voyager that prudently avoided the Tenarus Cluster, even though he was sending Voyager into a trap anyway. (VOY: "Basics, Part I")