Niki (Greek: Τ/Β Νίκη, "Victory") was a Niki-class destroyer that served in the Royal Hellenic Navy (1907–1945).

During World War I, Greece did not enter the war on the side of the Triple Entente until 1917 and, due to Greece's neutrality the four Niki-class ships had been seized by the Allies in October 1916, taken over by the French in November and served in the French Navy from 1917 to 1918.

By 1918, they were back on escort duty under Greek colors, mainly in the Aegean Sea.

In 1919, she conducted escort missions in the Black Sea carrying Greek refugees from Pontus.

She also participated in the Second World War, first carrying supplies in the Ionian Sea and after surviving the German invasion of April 1941, Niki served in conjunction with the Royal Navy based in Alexandria, Egypt.