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- Albert Olsson (1904–1994)
- Jan Olof Olsson, JOLO (1920–1974)
- Vladimir Oravsky (born 1947)
- Gösta Oswald (1926–1950)
- Johan Gabriel Oxenstierna (1750–1818)
- Bruno K. Öijer (born 1951), poet
- Klas Östergren (born 1955)
Read more about this topic: List Of Swedish-language Writers