The Sonic the Hedgehog 15th Anniversary was a celebration throughout 2006 of fifteen years since the start of the Sonic the Hedgehog series with the release of Sonic the Hedgehog in 1991. It was preceeded by the tenth anniversary and followed by the twentieth anniversary.
- Sonic X Trading Card Game
- 15th Anniversary statue by Toy Island
- Sonic X merchandise by Great Eastern Entertainment
- Sonic the Hedgehog #159-#169
- Sonic X #6-#15
- Archie Sonic Archives Volume 1
- Archie Sonic Archives Volume 2