The Super-class Star Dreadnought, colloquially known as the Super-class Super Star Destroyer or just Super Star Destroyer, was a heavy warship class in the Star Dreadnought league, often used as command ships and flagships in the Imperial Navy. At their prime, they were among the largest vessels in the galaxy, and were almost invincible in combat, although they were costly to operate.

Like most KDY-style warships, the ship's overall shape was pointed, although unlike the Imperial-class, the Super-class was closer to dagger-shaped. It also retained the KDY-style command bridge and possessed a massive cityscape on the top and, to a certain degree, at the aft. Its primary colors were dark gray and white for the main hull, and black for the cityscape sections, although the various lights aboard the vessel combined with operating in deep-space environments at times gave a more cerulean appearance to its hull. The Super-class measured 19 kilometers in length and was 100 times more massive than the ubiquitous Imperial-class Star Destroyer. 280,734 Imperial Navy officers, gunners and enlisted men were said to have crewed each vessel.
Though several variants of the Super-class existed, all followed similar design attributes in terms of structure. In terms of length, it was also tied with the Vengeance-class dreadnought as the largest ship class within Star Dreadnoughts or Super Star Destroyers. The Super-class was armed with 250 turbolaser batteries, 250 heavy turbolaser batteries, 250 ion cannons, 250 concussion missile tubes, and 40 tractor beam projectors. It would carry twelve TIE squadrons (including two TIE Interceptor squadrons) and more than fifty other small craft. For ground operations, it would carry a full corps of ground troops, apparently mixing stormtrooper legions with regular Army personnel, plus 25 AT-ATs, 50 AT-STs, and three prefabricated garrison bases. Vader's command ship, the Executor, was a Super-class Star Destroyer and one of the most famous Imperial vessels fielded.