Greek submarine Xifias ("swordfish") can refer to two ships of the Hellenic Navy:
- Greek submarine Xifias (1913), French-built submarine, in service 1913–1920
- Greek submarine Xifias (Υ-10) or Xiphias, the former British HMS Untiring, in Greek service 1945–1952
This article includes a list of ships with the same or similar names. If an internal link for a specific ship led you here, you may wish to change the link to point directly to the intended ship article, if one exists.