Relentless can refer to:
- In the Galactic Empire:
- Relentless, a Star Destroyer commanded by Moff Vanko
- Relentless, an Imperial I-class Star Destroyer commanded by Admiral Kassius Konstantine
- Relentless, an Imperial I-class Star Destroyer commanded by Captain Dorja and used by Moff Vilim Disra as a flagship during the latest point of its history
- Relentless, an Imperial I-class Star Destroyer that attempted to destroy the B-wing project
- In Darth Krayt's Galactic Empire:
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