G12

G12 may refer to:

• EMD G12, an American diesel locomotive
• Fiat G.12, an Italian transport aircraft
• HMS G12, a Royal Navy G-class submarine
• HMS Saumarez (G12), a Royal Navy S-class destroyer
• Matchless G12, a British motorcycle
• Prussian G 12, a Prussian steam locomotive
• SMS G12, a German V1-class torpedo boat

• "G12", a nickname for basketball player Ja Morant

• G12 (postcode), covering most of the West End of Glasgow
• G-12 (Brazilian football), a group of Brazilian football clubs
• G12 Hunchun–Ulanhot Expressway in China
• G12 Vision, a Colombian Christian movement
• Canon PowerShot G12, a digital camera
• County Route G12 (California)
• Group of Twelve, an intergovernmental organization