Madalena Barbosa (13 March 1942 – 21 February 2008) was the founder of the Movement for the Liberation of Women (Movimento de Libertação das Mulheres), in April 1974, created to "fight for the right to equality of opportunity without discrimination of gender".

In the course of her career, the activist represented Portugal and the European Union in various summits and international conferences, particularly in New York City.

Madalena Barbosa self-identified as "feminist, socialist and woman", called a "gender expert" in other places in the world.

Madalena Barbosa died a day before the launch of Que Força é Essa ("What Force Is This"), her chronicle of reflection on issues such as feminism and studies of gender equality, civic participation and politics.

The work was launched in the Fábrica Braço de Prata in Lisbon, as a final tribute.