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

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 (U) :

| Ship | Country or organization | Class | Type | Displacement (tons) | First commissioned | Fate |
| - | - | - | - | - | - | - |
| U-25 | Kriegsmarine | Type IA | submarine | 982 | 6 April 1936 | Sunk 1 August 1940 |
| U-37 – U-44 | Kriegsmarine | Type IX | submarine | 1,152 | | |
| U-65, U-66 U-103 – U-111 U-122 – U-124 | Kriegsmarine | Type IXB | submarine | 1,178 | | |
| U-66 – U-68 U-125 – U-131 U-153 – U-166 U-171 – U-176 U-501 – U-524 | Kriegsmarine | Type IXC | submarine | 1,232 | | |
| U-167 – U-170 U-183 – U-194 U-525 – U-550 U-801 – U-806 U-841 – U-846 U-853 – U-858 U-865 – U-870 U-877 – U-881 U-1221 – U-1235 | Kriegsmarine | Type IXC/40 | submarine | 1,257 | | U-877 was sunk by HMCS St. Thomas on 27 December 1944. All 56 members of the crew were saved. |
| U-190 | Kriegsmarine Royal Canadian Navy | Type IXC/40 | submarine | 1,257 | 24 September 1942 | Surrendered to RCN 11 May 1945, commissioned 19 May, paid off 24 July 1947, scuttled October 21, 1947 |
| U-889 | Kriegsmarine Royal Canadian Navy | Type IXC/40 | submarine | 1,257 | 4 August 1944 | Surrendered to RCN 10 May 1945, commissioned 14 May, paid off December 1945, scuttled 1947 |
| U-177 – U-182 U-195 – U-200 U-847 – U-852 U-859 – U-864 U-871 – U-876 | Kriegsmarine | Type IXD | submarine | 1,799 | | |
| U-459 – U-464 U-487 – U-490 | Kriegsmarine | Type XIV | submarine tender ("Milchkuh") | 1,932 | | |
| U-459 – U-464 U-487 – U-490 | Kriegsmarine | Type XXI | submarine ("Elektroboot") | 1,819 | | |
| U-D1 | Kriegsmarine | H | training submarine | 441 | 1915 | Sold to Netherlands 1917, scuttled and refloated by Germany 1939, paid off 23 November 1943 |
| Uganda | Royal Navy Royal Canadian Navy | Crown Colony | light cruiser | 8,800 | 21 October 1944 | Transferred to RCN as HMCS Uganda 21 October 1944, renamed HMCS Quebec 14 January 1952, scrapped 1961 |
| Ulster | Royal Navy | U | destroyer | 1,777 | 30 June 1943 | Paid off 1977, scrapped 1980 |
| Ulysses | Royal Navy | U | destroyer | 1,777 | 23 December 1943 | Paid off 1963, scrapped 1970 |
| Undaunted | Royal Navy | U | destroyer | 1,777 | 3 March 1944 | Paid off 1974, sunk as target 1978 |
| Underhill | United States Navy | Buckley | destroyer escort | 1,673 | 15 November 1943 | Sunk 24 July 1945 |
| Undine | Royal Navy | U | destroyer | 1,777 | 23 December 1943 | Scrapped November 1965 |
| Unicorn | Royal Navy | | aircraft maintenance carrier | 16,510 | 12 March 1943 | Scrapped 1960 |
| Unryū | Imperial Japanese Navy | Unryū | aircraft carrier | 17,150 | 6 August 1944 | Sunk 19 December 1944 |
| Unyō | Imperial Japanese Navy | Taiyō | escort carrier | 17,830 | 31 August 1942 | Sunk 15 September 1944 |
| Ursa | Royal Navy | U | destroyer | 1,777 | 23 December 1943 | Paid off November 1966 |
| Urchin | Royal Navy | U | destroyer | 1,777 | 24 September 1943 | Paid off 1964, scrapped 1967 |
| Urania | Royal Navy | U | destroyer | 1,777 | 18 January 1944 | Scrapped 1971 |
| Utah | United States Navy | | radio controlled target-ship and anti-aircraft training ship | 21,825 | 31 August 1911 | Former Florida-class battleship, recommissioned in 1932, sunk 7 December 1941 |
