Sonic might refer to:

• SONIC, System-Oriented Network Interface Controller: an ethernet-controller
• Sonic (train), an express-train in Japan
• Sonic (film), a 2006 film starring Jessica Alba
• If mach number equals 1, the flow is called "sonic"
• Sonic boom, the audible component of a shock wave in air
• Sonic Drive-In, a restaurant-chain selling fast food
• Sonic Foundry, a computer software company which develops programs for editing audio and video
• Sonic hedgehog gene and protein
• Sonic Solutions, a company operating in digital-media markets
• Sonic Team, a developer of computer games and video games
• Sonic the Hedgehog, a series of games by Sega and their title character
• Sonic Youth, an alternative rock band
• Sonic 102.9, an independently-owned radio station in Edmonton, Alberta, Canada that plays modern rock
• -sonic-, a prefix/infix/suffix for words with meanings that relate to acoustics.
• Supersonic
  • Supersonic and Hypersonic speeds
  • Seattle SuperSonics, a national Basketball Association team