C300 may refer to:
C300 Ground Refuel Vehicle, a USAF ground vehicle Canon C300, a professional Canon video camera Canal 300, a public television channel operated by Televisió de Catalunya in Catalonia Kodak EasyShare C300, a camera model Mercedes Benz C300 (C350), a car Pantech PG-C300, a camera phone advertised as "the world's smallest camera phone" (as of September 2006)