Derfflinger may refer to:
In warships: Derfflinger-class battlecruiser SMS Derfflinger, a battlecruiser of the Imperial German Navy, launched in 1913 V 620 Derfflinger, a vorpostenboot in service 1943-45
People with the surname Georg von Derfflinger (1606–1695), Austrian nobleman, field marshal in the army of Brandenburg
See also :Category:Derfflinger-class battlecruisers 3rd Grenadier zu Pferde (cavalry) regiment (Neumärkisches) of the 4. Kav. Brigade, a unit of the Prussian army in the 3rd Division, with the honorary name of "Freiherr von Derfflinger"