South Island may refer to:
Locations[]
- South Island, from the Sonic the Hedgehog series.
- South Island (Story Comic), from the Sonic the Hedgehog Story Comic published by the Japanese magazine Mega Drive Fan.
- South Island (Archie), from the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics.
- South Island (Pre-Super Genesis Wave), the version of South Island from before the Super Genesis Wave.
- South Island (Sonic the Comic), from the Sonic the Comic series published by Fleetway Editions.
- South Island (Sonic the Hedgehog: The Movie), the location in Sonic the Hedgehog: The Movie.
Levels[]
- South Island (Sonic the Fighters), the arena in Sonic the Fighters.
- Neo South Island Zone, the Zone in Sonic the Hedgehog Pocket Adventure.