Lida Gustava Heymann (15 March 1868 – 31 July 1943) was a German feminist, pacifist and women's rights activist.

[a] In this role she came into conflict with the law as she protested about the treatment of prostitutes and called for the abolition of state regulation for them.

With her vast inheritance she established a women's centre, offering meals, a crèche and counselling.

She also founded a co-educational high school and professional associations for female clerks and theatre workers.

In 1902 she jointly founded (with Anita Augspurg) the first German Verein für Frauenstimmrecht ("Society for Women's Suffrage").