P
| Ship | Country | Class and type | Displacement (tons) | First commissioned | Fate |
| Panther | Greece | Wild Beast class destroyer | 1,030 | 19 October 1912 | Decommissioned 1946 |
| Parana | Argentina | Rosario class gunboat | 1,055 | Sold 28 August 1958 | |
| Parker | USA | Benson class destroyer | 1,620 | 31 August 1942 | decommissioned 1947, scrapped 1973 |
| Pasadena | USA | Cleveland class light cruiser | 11,800 | 8 June 1944 | scrapped 1970 |
| Patria | Cuba | gunboat | 1,200 | ||
| Patroclus | UK | Armed merchant cruiser | 11,314 | 12 September 1939 | sunk 4 November 1940 |
| Patroller | UK | Ruler class transport carrier | 11,400 | 22 October 1943 (former USS Keneenaw) | Returned to USN 13 December 1946, scrapped Feb 1974 |
| Patterson | USA | Bagley class destroyer | 1,500 | 22 September 1937 | scrapped 1947 |
| Paul Jakobi | Germany | Type 1934A destroyer | 3,100 | 29 June 1937 | ceded to UK, then to France Feb 1946 and renamed Desaix, scrapped 1958 |
| Peder Skram | Denmark | Herluf Trolle class coastal defence ship | 3,735 | c.1908 | became Adler (Germany), sold for scrap 1 May 1949 |
| Pennsylvania | USA | Pennsylvania class battleship | 33,000 | 12 June 1916 | Decommissioned 29 August 1946, sunk as target 10 February 1948 |
| Pensacola | USA | Pensacola class heavy cruiser | 9,100 | 6 February 1930 | sunk as target 1948 |
| Perkins | USA | Mahan class destroyer | 1,450 | 18 September 1936 | sunk 29 November 1942 |
| Perseus | UK | Colossus class aircraft maintenance ship | 13,200 | 16 December 1944 | transferred to France 6 August 1946, renamed Arromanches |
| Perth | Australia | modified Leander class light cruiser | 6,980 | 29 June 1939 (former HMS Amphion) | sunk 1 March 1942 |
| Phelps | USA | Porter class destroyer leader | 1,850 | 26 February 1936 | scrapped 1947 |
| Philadelphia | USA | Brooklyn class light cruiser | 10,200 | 23 September 1937 | transferred to Brazil as Almirante Barroso 1951, scrapped 1973 |
| Phoenix | USA | Brooklyn class light cruiser | 10,200 | 3 October 1938 | transferred to Argentina as General Belgrano 1951, sunk by HMS Conqueror in Falklands War on 2 May 1982 |
| Ping Hai | China | light cruiser | 2,200 | became Yasoshima (Japan) | |
| Pindos | Greece | Hunt (Type III) class escort destroyer | 1,050 | 27 June 1942 | Returned to Royal Navy 1959, scrapped 1960 |
| Pinguin | Germany | Auxiliary cruiser | 17,600 | 6 February 1940 | sunk 8 May 1941 |
| Pioneer | UK | Colossus class aircraft maintenance ship | 13,200 | 8 February 1945 | scrapped Sep 1954 |
| Piorun | Poland | N class destroyer | 1,690 | 4 November 1940 (former Nerissa) | returned to the Royal Navy 26 October 1946, renamed Noble |
| Pittsburgh | USA | Baltimore class heavy cruiser | 17,200 | 10 October 1944 | decommissioned 1956, scrapped 1974 |
| Plunkett | USA | Gleaves class destroyer | 1,630 | 17 July 1940 | to Taiwan 1959, scrapped 1975 |
| Pluton | France | minelayer light cruiser | 4,773 | 10 April 1931 | lost 13 September 1939 |
| Pola | Italy | Zara class heavy cruiser | 11,730 | 1932 | sunk 28 March 1941 |
| Pompeo Magno | Italy | Capitani Romani class light cruiser (also known as exploratori oceanici) | 3,750 | ||
| Porter | USA | Porter class destroyer leader | 1,850 | 25 August 1936 | sunk 26 October 1942 |
| Portland | USA | Portland class heavy cruiser | 9,950 | 23 February 1933 | decommissioned 1946, scrapped 1959 |
| Portsmouth | USA | Cleveland class light cruiser | 11,800 | 20 September 1944 | scrapped 1974 |
| Premier | UK | Ruler class escort aircraft carrier | 11,400 | 3 November 1943 (former USS Estero) | Returned to USN 2 April 1946, sold into mercantile service 1947, renamed Rhodesia Star |
| Preston | USA | Mahan class destroyer | 1,450 | 27 October 1936 | sunk 14 November 1942 |
| Pretoria Castle | UK | Armed merchant cruiser, converted to escort aircraft carrier | 23,450 | 28 November 1939 | 26 January 1946, reconverted to passenger liner & renamed Warwick Castle |
| Primauguet | France | Duguay-Trouin class light cruiser | 7,249 | 1 April 1927 | scuttled 8 November 1942 |
| Prince David | Canada | Armed Merchant Cruiser | 5,736 | 28 December 1940 | Broken up 1951 |
| Prince of Wales | UK | King George V class battleship | 35,000 | 31 March 1941 | sunk 10 December 1941 |
| Princeton | USA | Independence class light carrier | 11,000 | 25 February 1943 | sunk 24 October 1944 |
| Prinz Eugen | Germany | enlarged Admiral Hipper class heavy cruiser | 14,680 | 1 August 1940 | sunk after A-bomb test at Bikini in 1946 |
| Providence | USA | Cleveland class light cruiser | 11,800 | 15 May 1945 | converted to missile cruiser 1959, scrapped 1980 |
| Psara | Greece | modified Freccia class destroyer | 1,350 | 1933 | sunk 20 April 1941 |
| Puncher | UK | Ruler class escort aircraft carrier | 11,400 | 5 February 1944 (former USS Willapa) | Returned to USN 16 January 1946, stricken 12 March 1946, sold into mercantile service renamed Muncaster Castle |
| Punjab | India | Bathurst class minesweeper | 1,025 | 20 March 1942 | Decommissioned 1949 |
| Pursuer | UK | Attacker class escort aircraft carrier | 11,400 | 14 June 1943 (former USS St George) | Returned to USN 12 February 1946, sold for scrap May 1946. |
| Punjabi | UK | Tribal class destroyer | 2,020 | 29 March 1939 | sunk 1 May 1942 |
Read more about this topic: List Of World War II Ships