Küchler, Kuechler, Kuchler are varying translitterations of a German surname. Notable people with the surname include:
Albert Küchler (1803–1886), a Danish painter associated with the Danish Golden Age
Alwin H. Küchler (born 1965), German cinematographer
Ernst Küchler (born 1944), German politician (SPD)
Ferdinand Küchler (1867–1937), a German violinist and composer
Friedrich Küchler (1822–1898), German civil servant and Hessian politician
Georg Karl Friedrich Wilhelm von Küchler (1881–1968), a German Field Marshal
Jacob Kuechler (1823–1893), surveyor, conscientious objector during the Civil War
Steven Küchler (born 1975), a German boxer