312 may refer to:

• The year 312 AD
• The year 312 BC
• The number 312
• One of several Ferrari racing cars with 3 litre 12-cylinder engines.:
  • The 312, 312B and 312T Formula One cars
  • The 312P and 312PB sportscar prototype class cars
• The British Rail Class 312 EMU
• The USS Young (DD-312) battleship
• The Chicago Loop area code 312.
• 312 Urban Wheat, a beer brewed by the Chicago-based Goose Island Brewery

az:312 (d qiql dirm ) it:312 (disambigua) ht:312 (menm non)