Sonic the Hedgehog may refer to:
- Sonic the Hedgehog (series), a video game series released by Sega starring its eponymous mascot
- Sonic the Hedgehog (character), a video game character and the main protagonist of the Sonic video game series released by Sega
- Sonic the Hedgehog (1991 video game), a 1991 platform game developed by Sega for the Sega Mega Drive/Genesis
- Sonic the Hedgehog (8-bit), a 1991 platform video game for the Sega Master System and the Game Gear
- Sonic the Hedgehog (2006 video game), a 2006 platform video game developed by Sonic Team for the Xbox 360 and PlayStation 3
- Sonic the Hedgehog (arcade game)
- Sonic the Hedgehog (manga), a comic published in Japan
- Sonic the Hedgehog (comics), a comic book series published in the United States
- Adventures of Sonic the Hedgehog, a 1993 American and French animated television series
- Sonic the Hedgehog: The Animated Series (Sonic SatAM), an American animated television series produced by DIC Entertainment from 1993 through 1994
- Sonic X, an anime series produced by TMS Entertainment that aired in Japan from 2003 to 2006
- Sonic the Hedgehog: The Movie, a 1999 Japanese two-episode OVA film series
- Sonic Underground is an animated series that originally ran from September 5, 1998 until May 30, 1999. It has now begun reruns on Disney XD.
- Sonic hedgehog homolog (SHH), a biological term referring to one of three proteins in the mammalian signaling pathway family called hedgehog