This is a list of Royal Navy ships and personnel lost during World War II, from 3 September 1939 to 1 October 1945.

See also List of ships of the Royal Navy.

The Royal Navy lost 50,758 men killed in action, 820 missing in action and 14,663 wounded in action.^[1] The Women's Royal Naval Service lost 102 killed and 22 wounded.^[1]

The Royal Navy lost 28 cruisers according to Stephen Roskill,^[2] and 34 including Commonwealth/Dominion ships, according to the Naval-History project.^[3]

The Royal Navy lost 132 destroyers, according to Stephen Roskill^[2] and 153, including Commonwealth/Dominion ships, according to the Naval-History project.^[3]

Surface ships caused the loss of 63 warships, comprising:

• 1 capital ship
• 1 aircraft carrier
• 8 cruisers
• 24 destroyers
• 29 submarines

Enemy submarines sank 54 warships, including:

• 2 capital ships
• 5 carriers
• 9 cruisers
• 33 destroyers
• 5 submarines

Enemy aircraft sank 77 warships, including:

• 2 capital ships
• 1 carrier
• 12 cruisers
• 55 destroyers
• 7 submarines

Mines caused the loss of 54 warships, including:

• 2 cruisers
• 26 destroyers
• 26 submarines

Shore defenses sank two destroyers, while one carrier, three cruisers, 15 destroyers and nine submarines were lost to accidents or unknown causes.

German forces sank 162 warships, including:

• 2 battleships
• 1 battlecruiser
• 6 carriers
• 15 cruisers
• 114 destroyers
• 24 submarines

Italian forces sank 58 warships, including:

• 6 cruisers
• 15 destroyers
• 37 submarines

Japanese forces sank 19 warships, including:

• 1 battleship
• 1 battlecruiser
• 1 carrier
• 3 cruisers
• 10 destroyers
• 4 submarines

A further destroyer and two sloops were lost to Vichy French shore batteries and warships.^[3]

• List of United States Navy losses in World War II

• Stephen Roskill: "Royal Navy - Britische Seekriegsgeschichte 1939-1945", Gerhard Stalling Verlag, 1961