January 1 - The train service between Oslo and Stockholm is closed after 133 years.
January 8–9 – 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.
January 18 - The company SIBA's CEO Fabian Bengtsson disappears in central Gothenburg, probably kidnapped.
February 3 – Fabian Bengtsson is found alive in Gothenburg.
February 5 - 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.
March 11 - Nintendo launches its new game console Nintendo DS in Sweden and the rest of Europe.
March 21 - An arson attack is carried out against the Communist Party's Röda Stjärnan bookstore in Jönköping.
April 15 -The Swedish political party Feministisk initiative is founded, but the decision to run in the parliamentary elections was made on 9 September 2005.
May 16 – Second day of Pentecost is no longer a public holiday in Sweden, because the national day would be instead.
May 29- The commemorative note "Tumba Bruk 250 years" is issued, Sveriges riksbank
May 31 – The Brattås murders.
June 1 – Smoking ban is introduced in restaurants, pubs and cafes in Sweden.
Swedish national day becomes a public holidayJune 6 - Sweden's national day becomes holiday.
June 10 – The new Svinesund Bridge is inaugurated and the older bridge is named the Old Svinesund Bridge.
July 1 - A new Swedish copyright law enters into force. The file sharing debate flares up again.
September 11 – The Armed Forces' telecommunications network and ground telecommunications unit (FMTM) is established.
September 18 - The Swedish church holds a church referendum.
November 1 – The healthcare guarantee starts to apply throughout Sweden.
November 25 – 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.
December 3 – The yuletide in Gävle is lit by two dressed-up men at 9:08 p.m.
December 10 – The 2005 Nobel Prize (see prize winners below) is awarded as usual in Stockholm's concert hall and in Oslo, with associated ceremonies.
