Grækenland 
Type 214: 4
Type 209 1100/1200: 4/4
Guppy III/IIA-klassen: 1/2
| S 115 L Katsonis (III)* | Portsmouth NSY, NH, USA | 5-3-45 | 12-7-45 | 3-1-56 | ex Remora/SS 487 |
| S 114 Papanikolis (IIA)** | Manitowoc SB, Wisconsin, USA | 7-7-43 | 12-12-43 | 18-4-44 | ex Hardhead/SS 365 |
| S 86 Triana (IIA) | - | - | - | ex Scabbardfish/SS 397 |
* Purchased 29-10-73.
** Purchased 26-7-72
2 Guppy: 1 Guppy IIA (Papanikolis) i 1972, 1 Guppy III (Katsonis) i 1973.
3 ubåde (Fleet Schnorkel Conversion)fra USA i 1957, 1958 og 1965. (inkl. 1 Gato)
Efter krigen: 6 ubåde udlånt fra Royal Navy + 1 som gave. 4 V-klassen udlånt 1943-46, retur 1957/58. 2 U-klassen udlånt 1945, retur 1952. De sidste var den ex-italienske Perla, som blev erobret til søs ud for Beirut i 1942 af briterne. I græsk tjeneste som Matrozos.
V-class submarines[edit] Under lease from Britain.
Pipinos (Υ-8) (1943–1959) Named after the naval hero of the Greek Revolution, Andreas Pipinos.[26]
Delfin (Υ-9) (1945–1957)
Triaina (Υ-14) (1946–1958)
Argonaftis (Υ-15) (1946–1958)U-class submarines[edit] Under lease from the United Kingdom.
Xifias (Υ-10) (1945–1952) - The ex-HMS Untiring (P59)
Amfitriti (Υ-11) (1945–1952) - The ex-HMS Upstart (P65)
2/4 Katsonis- og Proteus-klasserne: lev. 1926-28. 4 sænket under WWII.
Protefs-class submarines: 4 built in France in 1927-30.
Protefs (Υ-3) (1929–1940) Named after the marine god Proteus.
Nirefs (Υ-4) (1930–1947) Named after the marine god Nereus.
Triton (Υ-5) (1930–1942) Named after the marine god Triton.
Glafkos (Υ-6) (1930–1942) Named after the marine god Glaucus.
2 Schneider (Laubeuf-design) fra Frankrig bestilt 1909, lev. 1911 og 1912 (Delfin og Xifias): 460 tons. 2 mere bestilt 1912.
Nordenfelt I (Nordenfelt- og Garrett: 60 tons) i 1885, aldrig i tjeneste.