C57 may refer to: , an Admirable-class minesweeper of the Mexican Navy Caldwell 57, a barred irregular galaxy C57BL/6, a common inbred strain of lab mouse Fried Liver Attack, a chess opening , a County-class heavy cruiser of the Royal Navy Hours of Work and Manning (Sea) Convention, 1936 of the International JNR Class C57, a class of Japanese 4-6-2 "Pacific" type steam locomotive Lockheed C-57 Lodestar, an American military aircraft
See also C-57D, a fictional spaceship from the movie Forbidden Planet