The Hellenic Navy (HN; Greek: Πολεμικό Ναυτικό, romanized: Polemikó Naftikó, lit. 'War Navy', abbreviated ΠΝ) is the naval force of Greece, part of the Hellenic Armed Forces. The modern Greek navy historically hails from the naval forces of various Aegean Islands, which fought in the Greek War of Independence. The Hellenic Navy formed during the Hellenic Period ruled by monarchy (1833–1924 and 1936–1973) that has been recognized as the Royal Hellenic Navy (Βασιλικόν Ναυτικόν, Vasilikón Naftikón, abbreviated ΒΝ).
The Hellenic Navy is a Green-water navy. The total displacement of the fleet is approximately 150,000 tons. The HN also operates a number of naval aviation units.