Adolf Köster was a German politician of the Social Democratic Party of Germany (SPD) and diplomat. He served as Foreign Minister (1920) and Interior Minister (1921–1922).
- Occupation
- politician, university teacher, diplomat, writer
- Position held
- ambassador of Germany to Latvia, Reichsminister des Innern, Federal Minister for Foreign Affairs
- Citizenship
- Germany
- Born
- March 8, 1883
- Died
- February 18, 1930