Auto carrier, auto transporter, car carrier, or car transporter may refer to:
Transportation Autorack, in American English usage, a railroad car for transporting automobiles and light trucks Car transporter (rail), in UK English usage, a flat wagon railroad car for transporting automobiles and vans Car carrier trailer, a trailer or semi-trailer designed to transport passenger vehicles via truck Roll-on/roll-off, a ship designed to transport wheeled cargo, including new cars and other motor vehicles Auto Carriers Ltd., now AC Cars, a British automobile manufacturer SS Autocarrier, launched 1931, the first container ship
Biology Autotransporter protein, see Type V secretion system, T5SS Autotransporter domain