Events from the year 1912 in Sweden.

• Monarch – Gustaf V
• Prime Minister - Karl Staaff

• 3 January – The Svenska Scoutförbundet is formed.
• 15 January – Sven Hedin's contribution to the Swedish defence issue, Ett varningsord, is published and distributed in one million copies. ^[1]

• 2 April – The Swedish government puts forward a proposal for women's suffrage, but it is blocked by the FK.
• 28 April – A charity matinee is organised in Stockholm for the Swedish victims of the Titanic disaster. ^[1]

• 5 May–22 July –The Olympic Games take place in Stockholm. ^[2]
• 8 May – The Swedish Parliament decides to establish the National Board of Health and Welfare from 1 January 1913. ^[1]
• 19 May – August Strindberg is buried, and large crowds line the cortege route.^[1] Nathan Söderblom officiates at the funeral,^[3] which takes place at the 'Nya kyrkogården' (Norra begravningsplatsen) in Stockholm. ^[4]
• 1 June – The Stockholm Olympic Stadium, designed by Torben Grut, is inaugurated for the Olympic Games.
• 2 August – A Swedish study shows that farm trade has increased so much that other trade is suffering. ^[1]
• 16 August – The first Swedish aerial photograph is presented. ^[1]
• 16 August – Swedish Televerket starts to offer the Lyxtelegram service. ^[5]
• 17 September – The Pentecostal church in Skövde is founded as one of the first Pentecostal churches in Sweden.
• 27 September – 42-year-old Swedish engineer and inventor Gustaf Dalén, director of AGA since 1909, loses his eyesight when an experiment goes wrong. ^[6]
• 6 October – DN organises a competition for Sweden's most popular names. Erik wins before Karl, Margit and Anna. ^[3]
• 14 November – Erik Axel Karlfeldt is appointed Permanent Secretary of the Swedish Academy. ^[3]
• 1 December – The first stage of the Inlandsbanan railway, Östersund-Strömsund, opens for traffic in Sweden. ^[6]
• 1 December – The tradition of using Advent stars was introduced in Sweden by Sven Erik Aurelius' wife Julia.
• 10 December – Gustaf Dalén wins the Nobel Prize in Physics for inventing the automatic lighthouse. ^[1]

• 6 January – Johnny Bode, composer (died 1983)
• 8 January – Folke Hamrin, actor (died 1982)
• 16 January – Frank Sundström, actor (died 1993)
• 23 January – Manne Grünberger, actor (died 1997)
• 26 January – Gösta Kjellertz, singer (died 1984)
• 1 February – Rolf Gülich, motorcycle rider (died 2010)
• 12 February – Thore Christiansen, singer (died 1980)
• 17 February – Birgit Lennartsson, actor and singer (died 1997)
• 18 February – Bo Hederström, actor (died 2001)
• 18 February – Bengt Lissegårdh, artist (died 1979)
• 28 February – Prince Bertil, Duke of Halland, Swedish prince (died 1997)
• 12 March – Sixten Sason, industrial designer (died 1967)
• 18 March – Henrik Dyfverman, actor and television producer (died 1998)
• 22 March – Per-Erik Rundquist, novelist and poet (died 1986)
• 1 April – Sven-Otto Lindqvist, actor (died 1964)
• 2 April – Sigvard Törnqvist, rider and composer (died 1990)
• 7 April – Sven Bertil Norberg, actor (died 1967)
• 20 April – Erik Larsson, cross-country skier (died 1982)
• 4 May – Britta Brunius, actress (died 2000)
• 7 May – Rune Landsberg, actor (died 1989)
• 8 May – Dagny Carlsson, blogger (died 2022)
• 21 May – Sven Melin, actor and singer (died 1966)
• 21 May – Lille Bror Söderlundh, composer and singer (died 1957)
• 21 May – Ingmar Ström, author and bishop (died 2003)
• 29 June – Bertil Sjödin, actor (died 1997)
• 6 July – Ruth Moberg, actor and opera singer (died 1997)
• 11 July – Aino Taube, actor (died 1990)
• 14 July – Per-Martin Hamberg, composer, scriptwriter, director, author and radio producer (died 1974)
• 4 August – Raoul Wallenberg, architech, businessman and diplomat (died 1947)
• 8 August – Ilse-Nore Tromm, actress (died 1994)
• 25 August – Marta Lindberg, social democratic politician (died 2006)
• 9 September – Marianne Zetterström, author and journalist (died 2011)
• 21 September – Gösta Björling, opera singer (died 1957)
• 29 September – Sture Ericson, actor and director (died 1979)
• 6 October – Karin Albihn, actress (died 1974)
• 22 October – Henrik Sandblad, historian (died 1991)
• 14 November – Åke Jensen, actor and singer (died 1993)
• 27 November – Birgit Rosengren, actress (died 2011)
• 21 December – Brita Appelgren, actress and ballet dancer (died 1999)

• 14 May - August Strindberg, writer (born 1849)
• Lotten von Kræmer, writer and philanthropist (born 1828)