Grimlock may refer to:
- Grimlock (RID): The clumsy and reckless Dinobot from Transformers: Robots in Disguise.
- Grimlock (FOC): The courageous leader of the Lightning Strike Coalition Force from Transformers: Fall of Cybertron (who is also a Dinobot).
- Grimlock (RBA): the robotic dinosaur (who is...get this...also a Dinobot!) affiliated with the Rescue Bot Training Center, from Transformers: Rescue Bots Academy.