Vilhelmine Ullmann (née Dunker; 16 March 1816 – 28 April 1915) was a Norwegian pedagogue, publicist, literary critic and proponent for women's rights.

She was the daughter of socialite Conradine Birgitte Hansteen and Johan Friedrich Wilhelm Dunker.

[1][2] Growing up in a home where her mother was running a private school for girls, Vilhelmine learned French and German language as a child.

She was the mother of pedagogue and feminist Ragna Nielsen and educator and politician Viggo Ullmann.

She was a member of the Norwegian Association for Women's Rights from its foundation in 1884, and contributed to the feminist magazine Nylænde, where she wrote literary critics under the signature "M.D."