Alexander Freiherr von Dörnberg zu Hausen (17 March 1901 in Darmstadt – 7 August 1983 in Oberaula-Hausen, Hesse) was a German jurist, diplomat and SS officer.

After his Abitur in 1919, Dörnberg joined the Freikorps and participated in the violent domestic disputes in Germany after the end of World War I.

In 1926, Dörnberg was for some months private secretary to German Ambassador Ago von Maltzan and to the Embassy of Germany, Washington, D.C., before he officially joined the diplomatic service in 1927.

There was an intensive collaboration between Dörnberg and the then German ambassador to Britain, Joachim von Ribbentrop, with whom he became friends for the first time.

[3] In July 1938, Dörnberg was appointed as the successor to Vicco von Bülow-Schwante as Chief of the Protocol Department of the Foreign Office.