R
| Ship | Country | Class and type | Displacement (tons) | First commissioned | Fate |
| Raimondo Montecuccoli | Italy | Montecuccoli class light cruiser | 3,184 | 1935 | decommissioned 1964 |
| Rajah | UK | Ruler class escort aircraft carrier, | 11,400 | 17 January 1944 (former USS Prince) | Returned to USN 13 December 1946, sold into mercantile service 7 July 1947, renamed Drente |
| Rajputana | UK | Armed merchant cruiser | 16,568 | Dec 1939 | sunk 13 April 1941 |
| Raleigh | USA | Omaha class light cruiser | 7,050 | 6 February 1924 | scrapped 1946 |
| Ralph Talbot | USA | Bagley class destroyer | 1,500 | 14 October 1937 | scuttled after A-bomb test, 1948 |
| Ramb I | Italy | Armed merchant cruiser | 3,667 | 10 June 1940 | sunk 27 February 1941 |
| Ramb II | Italy | Armed merchant cruiser | 3,667 | 10 June 1940 | Taken over by the Japanese and renamed "Calitea II" - sunk on 12 January 1945 by US |
| Ramb III | Italy | Armed merchant cruiser | 3,667 | 10 June 1940 | Taken over by the Germans 9 September 1943, then in post-war service with the Yugoslav Navy |
| Ramillies | UK | Revenge class battleship | 29,150 | 1 September 1917 | Decommissioned 31 August 1945, scrapped 1949 |
| Ramsay | USA | Wickes class destroyer minelayer | 1,090 | 15 February 1919 | Decommissioned 19 October 1945, scrapped 1947 |
| Randolph | USA | Essex class fleet carrier | 27,100 | 29 June 1944 | decommissioned 13 February 1969, scrapped 1975 |
| Ranee | UK | Ruler class escort aircraft carrier, | 11,400 | 2 June 1943 (former USS Niantic) | Returned USN 21 November 1946, sold into mercantile 1948, renamed Friesland |
| Ranger | USA | aircraft carrier | 14,500 | 4 June 1934 | decommissioned 18 October 1946, scrapped 1947 |
| Rapana | UK | Rapana class merchant aircraft carrier and oil tanker | 16,000 | Jly 1943 | transferred to merchant service post-war; renamed Rotula |
| Ravager | UK | Ruler class escort aircraft carrier | 11,400 | 25 April 1943 (former USN) | Returned to USN 26 February 1946, sold into merchant service as Robin Trent |
| Rawalpindi | UK | Armed merchant cruiser | 16,697 | 1 October 1939 | Sunk 23 November 1939 |
| Razumny | USSR | Gnevny class destroyer | 1695 | 1941 | foundered 1960s |
| Reaper | UK | Ruler class escort aircraft carrier | 11,400 | 21 February 1944 (former USS Winjah) | Returned to USN 20 May 1946, sold into merchant service as South Africa Star |
| Redmill | UK | Captain class frigate | 1,300 | 30 November 1943 (former USN) | declared total loss 27 April 1945, returned to USN 20 January 1947 and scrapped |
| Reid | USA | Mahan class destroyer | 1,450 | 2 November 1936 | sunk 11 December 1944 |
| Reno | USA | Atlanta class light cruiser | 6,000 | 28 December 1943 | decommissioned 1946, scrapped 1962 |
| Renown | UK | Renown class battlecruiser | 32,000 | 20 September 1916 | scrapped 1948 |
| Repulse | UK | Renown class battlecruiser | 32,000 | 18 August 1916 | sunk 10 December 1941 |
| Resolution | UK | Revenge class battleship | 29,150 | 7 December 1916 | scrapped 1949 |
| Reuben James | USA | Clemson class destroyer | 1,200 | 24 September 1920 | sunk by U-552, 31 October 1941 |
| Revenge | UK | Revenge class battleship | 29,150 | 1 February 1916 | scrapped 1948 |
| Rhind | USA | Benham class destroyer | 1,500 | 10 November 1939 | scuttled after A-bomb test 1948 |
| Richard Beitzen | Germany | Type 1934 destroyer | 3,150 | 13 May 1937 | ceded to UK, scrapped 1947 |
| Richelieu | France Free French |
Richelieu class battleship | 35,000 | 15 July 1940 | scrapped 1968 |
| Richmond | UK USSR |
Town class destroyer | 1,060 | 26 November 1940 (former USS Fairfax) | transferred to USSR 16 July 1944 as Jivoochyi |
| Richmond | USA | Omaha class light cruiser | 7,050 | 2 July 1923 | scrapped 1946 |
| Rio Grande do Sul | UK | Bahia class light cruiser | 3,100 | 1910 | scrapped 1948 |
| Riquelme | Chile | Serrano class destroyer | 1,090 | Discarded 1963 | |
| Rivadavia | Argentina | Rivadavia class battleship | 27,720 | scrapped Feb 1956 | |
| Roberts | UK | Roberts class monitor | 8,000 | 27 October 1941 | scrapped June 1965 |
| Rodman | USA | Gleaves class destroyer | 1,630 | 29 April 1942 | to Taiwan 1955, damaged and struck 1969, destroyed for motion picture 1976 |
| Rodney | UK | Nelson class battleship | 34,000 | 10 November 1927 | scrapped 1948 |
| Roe | USA | Sims class destroyer | 1,570 | 5 January 1940 | scrapped 1947 |
| Roma | Italy | Vittorio Veneto class battleship | 41,000 | 14 June 1942 | sunk 9 September 1943 |
| Rosario | Argentina | Rosario class gunboat | 1,055 | Sold 4 December 1959 | |
| Rowan | USA | Benham class destroyer | 1,500 | 23 September 1939 | sunk 11 September 1943 |
| Royal Oak | UK | Revenge class battleship | 29,150 | 1 May 1916 | sunk 14 October 1939 |
| Royal Sovereign | UK | Revenge class battleship | 29,150 | 1 February 1916 | transferred to USSR as Arkhangelsk 1944 |
| Ruler | UK | Ruler class escort aircraft carrier | 11,400 | 22 December 1943 (former USS St. Joseph) | returned to USN 29 January 1946, scrapped 31 May 1946 |
| Russell | USA | Sims class destroyer | 1,570 | 3 November 1939 | scrapped 1947 |
| Ryuho | Japan | aircraft carrier | 13,360 | Scrapped in 1946 | |
| Ryūjō | Japan | aircraft carrier | 10,600 | sunk 24 August 1942 |
Read more about this topic: List Of World War II Ships