Agnes von Zahn-Harnack (19 June, 1884, Gießen – 22 May 1950, Berlin) was a German teacher, writer and women's rights activist.

She was born Agnes Harnack as it was only in 1914 that her father was awarded the hereditary title of nobility.

[1] As a young woman, von Harnack was principal of a girls' high school.

[1] Zahn-Harnack was chairwoman of the Bund Deutscher Frauenvereine from 1931 to its dissolution in 1933, when they chose to break the organisation up rather than continue under the supervision of the Nazi regime.

On 8 December 1919, Zahn-Harnack married Karl von Zahn (1877-1944) in Berlin, Germany.