1940 is the year when Norway became drawn into World War II. On 9 April Nazi Germany invaded the country, which remained occupied until 8 May 1945. See the article Occupation of Norway by Nazi Germany for a full exposition of World War II in Norway.
Government in Exile (in London) - went to exile on 7 June
Monarch - Haakon VII
Prime Minister - Johan Nygaardsvold (Labour Party)
German Military Governor
Reichskommissar in Norway - Josef Terboven beginning on 24 April
16 February - Altmark Incident: The British destroyer Cossack intercepts the German transport Altmark in Norwegian waters, recovering 299 British prisoners of war.
8 April - In Operation Wilfred the United Kingdom places fictitious and real naval mine fields off the coast of Norway. The aim was to provoke a German response.
The German troop transport ship MS Rio de Janeiro sinks after being torpedoed by the Polish submarine ORP Orzeł off Lillesand.
9 April -
German invasion of Norway: Nazi Germany carries out Operation Weserübung, and invades Denmark and Norway. Norway is at war for the first time since 1814. German forces land in several Norwegian ports and take Oslo; The Norwegian Campaign lasts two months.
German invasion of Norway: Egersund is captured by the Germans without resistance.
German invasion of Norway: Arendal is captured by the Germans without resistance.
German invasion of Norway: Stavanger Airport, Sola is attacked and captured by the Germans.
German invasion of Norway: German heavy cruiser Blücher is sunk by gunfire and torpedoes from the Norwegian coastal fortress Oscarsborg in the Oslofjord. Of the 2,202 German crew and troops on board, some 830 died (at least 320 of them crewmen). Most either drowned or burnt to death in the flaming oil slick surrounding the wreck.
German invasion of Norway: German air-landed soldiers land at and capture the airport at Fornebu near Oslo.
10 April - German invasion of Norway: Germans set up a Norwegian government under Vidkun Quisling, former minister of defence.
10 April - German invasion of Norway: The German cruiser Königsberg, damaged the previous day by Norwegian coastal artillery, is sunk by Fleet Air Arm dive bombers in Bergen harbour
11 April - Norwegian Campaign: First Battle of Narvik, British destroyers and aircraft successfully make a surprise attack against a larger German naval force. A second attack on 13 April will also be a British success.
13 April - Norwegian Campaign: British and French troops begin landing at Namsos and Harstad in Norway. The landings are aimed at recapturing Trondheim and Narvik, respectively.
14–19 April - Norwegian Campaign: Battle of Dombås: Norwegian Army units defeat German Fallschirmjäger attack.
24 April - German occupation of Norway: Adolf Hitler names Josef Terboven as Reichskommissar of Norway with power to invoke and enforce decrees.
27 April - Norwegian Campaign: British troops begin pull-out from southern and central parts of Norway.
1 May - Norwegian Campaign: Allies begin evacuating south-western and central-Norwegian ports.
5 May - Norwegian Campaign: Hegra Fortress capitulates after all other Norwegian forces in southern Norway have laid down their arms (see Battle of Hegra Fortress).
10 May - Norwegian Campaign: The Hurtigruten steamer Nordnorge is sunk at Hemnesberget while being used as a German troop ship.
24 May - Norwegian Campaign: The British make a final decision to cease operations in Norway.
27 May - Norwegian Campaign: Most of Bodø was destroyed during a Luftwaffe attack. 6,000 people were living in Bodø at that time, and 3,500 people lost their homes in the attack.
28 May - Norwegian Campaign: Norwegian, French, Polish and British forces recapture the Norwegian harbour-city Narvik which was of great strategic importance to Germany. This is the first allied infantry victory of World War II.
7 June - Norwegian Campaign: The Norwegian Royal Family and the Norwegian Government was evacuated from Tromsø on board the British cruiser Devonshire which later on arrived safely in London where Haakon VII and his cabinet set up a Norwegian government in exile.
8 June - Norwegian Campaign: The last of the Allied troops leave Norway.
10 June - Norwegian Campaign: Mainland Norway surrenders to German forces.
16 August – The Communist Party of Norway is banned in German-occupied Norway.
28 September - Vidkun Quisling becomes head of the German-appointed provisional councillors of state in Norway.
Norsk Hydro begins construction of a magnesium carbonate plant at Herøya, but the German invasion of Norway stops the plans.
2 January - Karenanne Gussgard, judge
17 January - Einar Økland, poet, playwright, essayist and children's writer
31 January - Martin Schøyen, businessman, traveller, historian, paleographer and book collector
15 February - Helen Bøsterud, politician and Minister
3 March - Mona Røkke, politician and Minister
4 March - Arild Lund, politician
10 March
Ove Rullestad, politician
Finn Thorsen, international soccer player
11 March
Svein Alsaker, politician
Kirsten Engelstad, librarian
5 April - Georg Apenes, jurist and politician
7 April - Rune Skarstein, economist
14 April - Per Aunet, politician
16 April - Berit Mørdre Lammedal, cross country skier and Olympic gold medallist
18 April - Hans Flock, judge
8 May - Karl Erik Harr, painter, illustrator, graphic artist and author
12 May - Svein Hatløy, architect, professor and founder of the Bergen School of Architecture
16 May - Kjetil Bang-Hansen, actor, dancer, stage producer and theatre director
20 May - Frode Thingnæs, jazz composer, arranger, conductor and trombone player
25 May - Gunnar Skaug, politician (died 2006)
29 May - Kjell Helland, politician
30 May - Svenn Kristiansen, politician
19 June - Tor Røste Fossen, soccer player and manager
24 June - Oddvard Nilsen, politician
3 July - Tor Nymo, politician
6 July - Kristine Rusten, politician (died 2003)
12 July - Anne Marie Blomstereng, politician
14 July - Oddbjørn Hågård, politician
15 July - Thor-Eirik Gulbrandsen, politician
30 July - Kjellfred Weum, hurdler
26 August - Gudleiv Forr, journalist and political commentator
28 August - Odd Holten, politician
29 August - Gunnar Berge, politician and Minister
15 September - Jorunn Hareide, historian of literature
19 September - Tove Veierød, politician and Minister
1 October - Knut Vartdal, politician
4 October - Erik Dalheim, politician
5 October - Eldrid Lunden, poet
8 October - Knut Erik Jensen, film director
13 October - Grete Knudsen, politician and Minister
1 November - Jon Skolmen, actor and comedian
10 November - Stein Winge, actor, stage producer and theatre director
11 November - Arne Rinnan, ship's captain
12 November - Magnar Sætre, politician (died 2002)
24 November - Atle Thowsen, historian
11 December - Ann-Marit Sæbønes, politician
12 December - Bjørn Skogmo, diplomat
15 December - Per Rolf Sævik, politician
19 December - Kirsti Coward, judge
21 December - Rolf Sagen, author
17 February - Waldemar Christofer Brøgger, geologist and mineralogist (born 1851)
20 February - Nicolai A. Grevstad, diplomat, politician and newspaper editor in America (born 1851)
8 April - Leif Welding-Olsen, naval officer, first casualty in the war between Norway and Nazi Germany (born 1895)
9 April - Øyvinn Øi, military officer (born 1901)
9 April - Odd Isaachsen Willoch, naval officer (born 1885)
29 April - Ole Lilloe-Olsen, rifle shooter and Olympic gold medallist (born 1883)
26 June - Severin Andreas Heyerdahl, physician (born 1870)
1 August - Erling Falk, businessman and politician (born 1887)
12 August - Thorvald Astrup, architect (born 1876)
29 August - Gerda Grepp, war correspondent (born 1907)
2 October - Johan Anker, sailor, yacht designer and double Olympic gold medallist (born 1871).
2 October - Anders Platou Wyller, philologist and humanist (born 1903)
4 October - Jacob Vidnes, trade unionist, newspaper editor and politician (born 1875)
15 October – Karl Uchermann, painter and illustrator (born 1855).
24 October - Johan Wollebæk, jurist and diplomat (born 1875)
28 October - Hans Dons, naval officer and the first Norwegian to fly in Norway (born 1882)
4 November - Christian Sparre, politician (born 1859)
6 November - Ivar Andresen, opera singer (born 1896)
10 November - Michael Staksrud, speed skater and World Champion (born 1908)
19 December - Hendrik Christian Andersen, sculptor, painter and urban planner in America (born 1872)
Daniel Isaachsen, physicist (born 1859)
