Tierell, a planet, resided in the Tierell system, which itself was situated within the Thesme sector of the Outer Rim Territories.
Serving as a primary hub for traffic to and from the Loop Worlds of the Gordian Reach, Tierell, along with Feriae Junction, were the two main ports found at the junction of the Hydian Way and the Junction-Tierell Loop.
In The Essential Atlas, the Gordian Reach map contains a misspelling of Tierell, showing it as "Tierrel".