1 January – The train service between Oslo and Stockholm is closed after 133 years.
8–9 January – A strong storm, Hurricane Gudrun, hits northern Europe, including southern Sweden. At least 18 people are killed, 300,000 households and 75 million cubic meters of forest are felled.
18 January – The company SIBA's CEO Fabian Bengtsson disappears in central Gothenburg, probably kidnapped.
3 February – Fabian Bengtsson is found alive in Gothenburg.
5 February – Sweden's Prime Minister Göran Persson is appointed an honorary doctor of medicine at Örebro University. The appointment arouses strong protests, as it is considered a reward for the prime minister's having made Örebro University into a university.
11 March – Nintendo launches its new game console Nintendo DS in Sweden and the rest of Europe.
21 March – An arson attack is carried out against the Communist Party's Röda Stjärnan bookstore in Jönköping.
15 April -The Swedish political party Feministisk initiative is founded, but the decision to run in the parliamentary elections was made on 9 September 2005.
16 May – Second day of Pentecost is no longer a public holiday in Sweden, because the national day would be instead.
29 May- The commemorative note "Tumba Bruk 250 years" is issued, Sveriges riksbank
31 May – The Brattås murders.
1 June – Smoking ban is introduced in restaurants, pubs and cafes in Sweden.
Swedish national day becomes a public holiday6 June – Sweden's national day becomes holiday.
10 June – The new Svinesund Bridge is inaugurated and the older bridge is named the Old Svinesund Bridge.
1 July – A new Swedish copyright law enters into force. The file sharing debate flares up again.
11 September – The Armed Forces' telecommunications network and ground telecommunications unit (FMTM) is established.
18 September – The Swedish church holds a church referendum.
1 November – The healthcare guarantee starts to apply throughout Sweden.
25 November – A Swedish vehicle from the Swedish Foreign Forces is exposed to a bomb attack during a reconnaissance mission in Afghanistan. Two of the four people in the vehicle later died in hospital.
3 December – The yuletide in Gävle is lit by two dressed-up men at 9:08 p.m.
10 December – The 2005 Nobel Prize (see prize winners below) is awarded as usual in Stockholm's concert hall and in Oslo, with associated ceremonies.
