C12

C12, C.XII or C-12 may be:


 * C-12 Huron, a logistics support aircraft of the U.S. Military (military versions of the Beechcraft Super King Air)
 * C-12 Vega, an early transport of the United States Army Air Corps
 * Albatros C.XII, a World War I German military reconnaissance aircraft
 * HMS C12, a British C class submarine of the Royal Navy
 * USS Columbia (C-12), a light cruiser of the United States Navy