Charlotte Bolette Klein née Unna (1834–1915) was a Danish educator and women's rights activist. A motivated teacher, from the mid-1870s until 1907 she was the principal of the Arts and Crafts School for Women in Copenhagen. Klein was a member of the Danish Women's Society and a strong supporter of women's suffrage. Shortly before her death, she published her ideas in Hvad jeg venter af Kvinderne (What I Expect of Women).