Flower class

Flower class may refer to:
 * Flower-class schooner, Bermudian-built schooners of the Royal Navy
 * Flower-class sloop, sloops of the Royal Navy serving in World War I
 * Flower-class corvette, corvettes of the Royal Navy, Royal Canadian Navy and other navies, serving in World War II
 * GWR 4100 Class, steam locomotives of the Great Western Railway