At least three ships of the Hellenic Navy have borne the name Niki (, "Victory"):
, a launched in 1906 and stricken in 1945. , a launched in 1942 as USS Eberle she was transferred to Greece in 1951 and renamed. She was scrapped in 1972. , a commissioned in the German Navy in 1961 as Thetis she was transferred to Greece in 1991 and renamed. She was decommissioned in 2009.