Grounder may refer to:
- Grounder, the enemy from the Sonic the Hedgehog series video games.
- Grounder (Adventures of Sonic the Hedgehog), the character in Adventures of Sonic the Hedgehog.
- Grounder (Sonic the Comic), the character in the Sonic the Comic series published by Fleetway Editions.
- Grounder (Archie), the character in the Sonic the Hedgehog comic series and its spin-off published by Archie Comics.