Oscar Magnus Fredrik Björnstjerna was a Swedish officer, diplomat and politician. He served as Minister for Foreign Affairs from 1872 to 1880.
- Occupation
- politician, diplomat, military personnel
- Position held
- Minister for Foreign Affairs of Sweden, member of the First Chamber, Prime Minister for Foreign Affairs, envoy extraordinary and minister plenipotentiary
- Citizenship
- Sweden
- Born
- March 6, 1819
- Died
- September 2, 1905, 1905