11D or 11d may refer to: *

GCR Class 11D Although overshadowed by the later and more famous steam locomotives that John G. Robinson would go on to design, the Great Central Railway Class 11B 4-4-0 Express Passenger engines were a successful class which totalled 40. Built from 1901 to ...

, a class of British 4-4-0 steam locomotive * Kepler-11d, an exoplanet orbiting the star Kepler-11

See also