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Sonic the Hedgehog is a 2006 video game released for the Xbox 360 and PlayStation 3. A Wii version was planned but reworked into Sonic and the Secret Rings. It was developed by Sonic Team and released to celebrate the 15th anniversary of the Sonic the Hedgehog franchise.

The game shares its name with two earlier video games, a manga, a television series, a comic book series and, of course, the character of Sonic the Hedgehog himself. To disambiguate, the game is frequently referred to as Sonic the Hedgehog 2006, Sonic 2006 or Sonic '06. Sonic 360 (despite not being exclusive to the Xbox 360) and Sonic Next-Gen were also common names when the game debuted, but have since fallen out of use.

Sonic '06 was the first Sonic game to be released in what is now considered the seventh generation of video game consoles. It builds on ideas first floated in Sonic Adventure and Sonic Adventure 2 and, to a lesser extent, Sonic Heroes and Shadow the Hedgehog. Many of the characters were subtly redesigned (save for Dr. Eggman, whose appearance is far more drastic), and settings were made more realistic presumably to take advantage of the hardware.

Sonic '06 remains a controversial release in the franchise and was the subject of extremely negative review scores on release. It is widely considered one of the worst Sonic the Hedgehog games in the franchise, followed closely by 2014's Sonic Boom: Rise of Lyric.