Wilhelmine Theodore Marie Cauer, née Schelle, usually known as Minna Cauer (1 November 1841 in Freyenstein – 3 August 1922 in Berlin), was a German pedagogue, activist in the so-called "radical" wing of the German bourgeois feminist movement, pacifist and journalist.

She then trained as a teacher, working in Paris for a year before marrying Eduard Cauer, a school inspector, and moving with him to Berlin.

[1] Widowed for a second time in 1881, Cauer resumed work as a teacher and started studying women's history.

[1] In 1893 she cofounded the Girls' and Women's Groups for Social Assistance Work (Mädchen- und Frauengruppen für Soziale Hilfsarbeit).

However, with the German women's suffrage movement in disarray, Cauer turned to pacifist activities throughout World War I.