List of ships of World War II (X)
# List of ships of World War II (X)

The List of ships of the Second World War contains major military vessels of the war, arranged alphabetically and by type. The list includes armed vessels that served during the war and in the immediate aftermath, inclusive of localized ongoing combat operations, garrison surrenders, post-surrender occupation, colony re-occupation, troop and prisoner repatriation, to the end of 1945. For smaller vessels, see also list of World War II ships of less than 1000 tons. Some uncompleted Axis ships are included, out of historic interest. Ships are designated to the country under which they operated for the longest period of the Second World War, regardless of where they were built or previous service history. Submarines show submerged displacement.

Click on headers to sort column alphabetically.

List of ships of World War II (X) :

| Ship | Country or organization | Class | Type | Displacement (tons) | First commissioned | Fate |
| - | - | - | - | - | - | - |
| X2 | Royal Navy | Archimede | submarine | 1,230 | 19 March 1934 | Former Italian Galileo Galilei, captured by RN on 18 June 1940; paid off January 1946 |
| X3 | Royal Navy | X | submarine | 30 | 1942 | paid off 1945 |
| X4 | Royal Navy | X | submarine | 30 | 1942 | paid off 1945 |
| X5 | Royal Navy | X | submarine | 30 | 1943 | sunk 22 September 1943 |
| X6 | Royal Navy | X | submarine | 30 | 1943 | scuttled 22 September 1943 |
| X7 | Royal Navy | X | submarine | 30 | 1943 | scuttled 22 September 1943 |
| X8 | Royal Navy | X | submarine | 30 | 1943 | scuttled 17 September 1943 |
| X9 | Royal Navy | X | submarine | 30 | 1943 | foundered under tow 16 September 1943 |
| X10 | Royal Navy | X | submarine | 30 | 1943 | scuttled 3 October 1943 |
| X20 | Royal Navy | X | submarine | 30 | 1944 | paid off |
| X21 | Royal Navy | X | submarine | 30 | 1944 | |
| X22 | Royal Navy | X | submarine | 30 | 1944 | sank in training 7 February 1944 |
| X23 | Royal Navy | X | submarine | 30 | 1944 | paid off 1945 |
| X24 | Royal Navy | X | submarine | 30 | 1944 | paid off 1945 |
| X25 | Royal Navy | X | submarine | 30 | 1944 | paid off 1945 |
| Xanthus | United States Navy | Xanthus | repair ship | 5,801 | 9 May 1945 | built as repair ship, armed and served in various capacities; decommissioned 1946 |
| XE1 | Royal Navy | XE | submarine | 33 | 1944 | paid off 1945 |
| XE2 | Royal Navy | XE | submarine | 33 | 1944 | paid off 1945 |
| XE3 | Royal Navy | XE | submarine | 33 | 1944 | paid off 1945 |
| XE4 | Royal Navy | XE | submarine | 33 | 1944 | paid off 1945 |
| XE5 | Royal Navy | XE | submarine | 33 | 1944 | paid off 1945 |
| XE6 | Royal Navy | XE | submarine | 33 | 1944 | paid off 1945 |
| XE7 | Royal Navy | XE | submarine | 33 | 1944 | paid off 1952 |
| XE8 | Royal Navy | XE | submarine | 33 | 1944 | sunk as target 1952, recovered 1973; museum ship |
| XE9 | Royal Navy | XE | submarine | 33 | 1944 | paid off 1952 |
| XE10 | Royal Navy | XE | submarine | 33 | | cancelled incomplete 1945 |
| XE11 | Royal Navy | XE | submarine | 33 | 1944 | lost 6 March 1945 |
| XE12 | Royal Navy | XE | submarine | 33 | 1944 | paid off 1952 |
| Xenia | United States Navy | Artemis | attack cargo ship | 4,087 | 28 July 1945 | armed combat transport, decommissioned 1962 |
| XT1 | Royal Navy | XT | training submarine | 30 | 1944 | paid off 1945 |
| XT2 | Royal Navy | XT | training submarine | 30 | 1944 | paid off 1945 |
| XT3 | Royal Navy | XT | training submarine | 30 | 1944 | paid off 1945 |
| XT4 | Royal Navy | XT | training submarine | 30 | 1944 | paid off 1945 |
| XT5 | Royal Navy | XT | training submarine | 30 | 1944 | paid off 1945 |
| XT6 | Royal Navy | XT | training submarine | 30 | 1944 | paid off 1945 |
