Baltzar Julius Ernst von Platen (1804–1875) was a Swedish noble, naval officer, politician and diplomat. He served as minister for naval affairs for two terms between 1849 and 1852 and between 1862 and 1868 as well as foreign minister of the United Kingdoms of Sweden and Norway for one year between 1871 and 1872.
- Occupation
- politician, military personnel
- Position held
- Prime Minister for Foreign Affairs, Minister for Naval Defence, Minister for Naval Defence, member of the First Chamber
- Citizenship
- Sweden
- Born
- April 16, 1804
- Died
