Delfin-class submarine may refer to one of the following classes of submarine:
Russian submarine Delfin, the first combat-capable Russian submarine, commissioned in 1903 Greek Delfin-class submarine, a French-built class of two submarines built for the Royal Hellenic Navy in 1910, named for the Greek submarine Delfin (1912) Soviet Delfin-class submarine an alternative name for the Delta IV class of nuclear, ballistic-missile submarines employed by the Soviet Navy Russian Delfin-class submarine, an alternative name for the Delta IV class of nuclear, ballistic-missile submarines employed by the Russian Navy Spanish Delfin-class submarine, an alternative name for Daphné-class submarines of the Spanish Navy
See also , a class of Portuguese Navy submarines Dolphin (disambiguation)