Barbara Unmüßig (born 1956 in Freiburg im Breisgau) is a German political scientist and from 2002 to 2022 board member of the Heinrich Böll Foundation.
In 1991, Unmüßig became head of a project position at the UN Conference on Environment and Development (UNCED), the German Nature Conservation Ring (DNR) and the Bundes für Umwelt und Naturschutz Deutschland.
Since 2013, Barbara Unmüßig has been a member of the board of trustees of forum Nachhaltig Wirtschaften, a magazine dedicated to shaping a sustainable future.
From 2002 to 2022 she was a board member of the Heinrich Böll Foundation, initially together with Ralf Fücks and from July 2017 together with Ellen Ueberschär.
She was the jury chairwoman of the Anne Klein Women's Prize, which the Heinrich Böll Foundation has awarded annually since 2012 to women who have distinguished themselves through outstanding commitment, courage and civil courage for the realisation of gender democracy, the rights and self-determination of lesbians, gays, transsexuals and intersexuals.