List of shipwrecks in 1940
January
{{main|List of shipwrecks in January 1940}}
February
{{main|List of shipwrecks in February 1940}}
March
{{main|List of shipwrecks in March 1940}}
April
{{main|List of shipwrecks in April 1940}}
May
{{main|List of shipwrecks in May 1940}}
June
{{main|List of shipwrecks in June 1940}}
July
{{main|List of shipwrecks in July 1940}}
August
{{main|List of shipwrecks in August 1940}}
September
{{main|List of shipwrecks in September 1940}}
October
{{main|List of shipwrecks in October 1940}}
November
{{main|List of shipwrecks in November 1940}}
December
{{main|List of shipwrecks in December 1940}}
Unknown date
{{shipwreck list begin |date=Unknown date 1940 |sort=}}
{{shipwreck list item
|ship={{Ship|PS|Captain Sturt||2}}
|flag={{flag|Australia|civil}}
|desc=The paddle steamer sank off Kangaroo Island, South Australia.{{cite web |url=http://www.wrecksite.eu/wreck.aspx?52641 |title=Captain Sturt (+1940) |publisher=Wrecksite |access-date=7 November 2011}}
}}
{{shipwreck list item
|ship={{SS|Cläre Hugo Stinnes I|1935|2}}
|flag={{flag|Norway}}
|desc=World War II: The captured German cargo ship was sunk at Ulvik. She was refloated later in 1940 and re-entered German service.{{cite book |title=The World's Merchant Fleets, 1939 |first=Roger |last=Jordan |publisher=Chatham Publishing |location=London |year=1999 |page=468 |isbn=1-86176-023-X}}
}}
{{shipwreck list item
|ship={{Ship|ST|Dalhousie||2}}
|flag={{flag|United Kingdom|civil}}
|desc=World War II: The tug was scuttled.{{cite web |url=http://www.wrecksite.eu/wreck.aspx?152514 |title=SS Dalhousie (+1940) |publisher=Wrecksite |access-date=8 November 2011}}
}}
{{shipwreck list item
|ship=Fern
|flag={{flag|United States|1912}}
|desc=With no one on board, motorboat was wrecked in the middle of George Inlet on the southern coast of Revillagigedo Island in the Alexander Archipelago, Alaska Territory.[https://alaskashipwreck.com/shipwrecks-a-z/alaska-shipwrecks-f/ alaskashipwreck.com Alaska Shipwrecks (F)]
}}
{{shipwreck list item
|ship={{SS|Haalegg|1922|2}}
|flag={{flag|Norway}}
|desc=World War II: The cargo ship was either bombed and sunk at Narvik, Norway, by Luftwaffe aircraft on 17 May; or was shelled and sunk by Royal Navy ships on 13 April. She was raised in 1945, repaired and returned to service.{{cite web |url=http://www.warsailors.com/homefleet/shipsh1.html |title=Norwegian Homefleet - WW II, Ships starting with Ha |publisher=Warsailors |access-date=9 February 2012}}
}}
{{shipwreck list item
|ship={{PS|Jupiter||2}}
|flag={{flag|Australia|civil}}
|desc=The paddle steamer sank off Port Adelaide, South Australia.{{cite web |url=http://www.wrecksite.eu/wreck.aspx?52619 |title=Jupiter (+1940) |publisher=Wrecksite |access-date=9 November 2011}}
}}
{{shipwreck list item
|ship={{SS|Kurrara||2}}
|flag={{flag|Australia|civil}}
|desc=The coaster ran aground at Port Stephens, New South Wales and was wrecked.{{cite web |url=http://www.wrecksite.eu/wreck.aspx?51070 |title=Kurrara (+1940) |publisher=Wrecksite |access-date=9 November 2011}}
}}
{{shipwreck list item
|ship={{PS|Lancashire Lass||2}}
|flag={{flag|Australia|civil}}
|desc=The paddle steamer sank off Adelaide, South Australia.{{cite web |url=http://www.wrecksite.eu/wreck.aspx?52257 |title=Lancashire Lass (+1940) |publisher=Wrecksite |access-date=10 November 2011}}
}}
{{shipwreck list item
|ship={{Ship||Lass of Geraldton|sailing ship|2}}
|flag={{flag|Australia|civil}}
|desc=The sailing ship sank in Australian waters.{{cite web |url=http://www.wrecksite.eu/wreck.aspx?53037 |title=Lass of Geraldton (+1940) |publisher=Wrecksite |access-date=10 November 2011}}
}}
{{shipwreck list item
|ship={{SS|Marzocco|1918|2}}
|flag={{Flag|United Kingdom|government}}
|desc=World War II: The cargo ship was scuttled as a blockship off Peterhead, Aberdeenshire.{{cite web |url=http://www.wrecksite.eu/wreck.aspx?132074 |title=SS Marzocco (+1940) |publisher=Wrecksite |access-date=10 November 2011}}
}}
{{shipwreck list item
|ship=HMAS Psyche
|flag={{naval|Australia|1913}}
|desc=The lighter sank in Salamander Bay off Port Stephens.{{cite web |url=http://www.wrecksite.eu/wreck.aspx?51613 |title=Psyche (+1940) |publisher=Wrecksite |access-date=13 November 2011}}
}}
{{shipwreck list item
|ship={{SS|Raab Karcher||2}}
|flag={{flagcountry|Nazi Germany}}
|desc=World War II: The cargo ship was bombed and sunk in the Oosterschelde.{{cite web |url=http://www.wrecksite.eu/wreck.aspx?996 |title=SS Raab Karcher (+1940) |publisher=Wrecksite |access-date=13 November 2011}}
}}
{{shipwreck list item
|ship={{SS|Tealings||2}}
|flag={{Flag|United Kingdom|civil}}
|desc=World War II: The cargo ship was bombed and sunk.{{cite web |url=http://www.wrecksite.eu/wreck.aspx?15575 |title=SS Tealings (+1940) |publisher=Wrecksite |access-date=14 November 2011}}
}}
{{shipwreck list item
|ship={{HMS|Thames|N71|6}}
|flag={{naval|UK}}
|desc=World War II: The {{sclass2|River|submarine|2}} went missing in the North Sea between 23 July and 3 August. She probably struck a mine and sank in the North Sea off Stavanger, Norway ({{coord|57|20|N|3|10|E}}) with the loss of all 63 crew.{{cite web |url= http://www.naval-history.net/xDKWW2-4007-20JUL01.htm |title=Naval Events, July 1940, Part 1 of 2, Monday 1st- Sunday 14th |publisher=Naval History |access-date=23 November 2011}}
}}
{{shipwreck list end}}