K class or Class K may refer to:
Locomotives
LB&SCR K class (1913), England
SECR K and SR K1 classes (1914), England
NZR K class (1877), New Zealand
NZR K class (1932), New Zealand
Tasmanian Government Railways K class, Tasmania
Victorian Railways K class, Australia
WAGR K class, steam, Western Australia
WAGR K class (diesel), Western Australia
Ships
K-class destroyer, British warships of World War II
German K class cruiser, German warships of World War II
K-class sloop, Dutch warships
K-class submarine (disambiguation), several classes of warships
British Columbia K-class ferry, Canadian ships
Sydney K-class ferry, Sydney Harbour ferries
K-class torpedo boat, Dutch warships
Other uses
K-class blimp, blimps built for the US Navy
Class K, a classification for stars
Energy class, an earthquake magnitude scale
