The Elli-class frigates are a series of frigates operated by the Hellenic Navy. The ships are of Dutch origin and are also known as Kortenaer-class or Standard-class or S-class frigates. The first two ships, which have lengthened hangars and different armament were built specifically for the Hellenic Navy. The remaining ships are ex-Royal Netherlands Navy S-frigates of the Kortenaer class transferred to the Hellenic Navy in the 1990s and early 2000s. These robust and reliable ships constitute the backbone of the Hellenic Navy. Elli, for which the class is named, is itself named after two famous Greek cruisers, one of which was sunk during peacetime before the Greco-Italian War.

The Hellenic Navy 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. During the periods of monarchy it was known as the Royal Hellenic Navy.