Hanna Muralt Müller (born 16 November 1947) is a Swiss politician, member of the Social Democratic Party of Switzerland. She held the office of Vice-Chancellor of Switzerland between 1991 and 2005, in charge of the Federal Council sector, which organizes and documents the council's activities.Initially working as a school teacher, she obtained a degree in history at the University of Bern in 1976. In 1978, she worked as a scientific adviser to a parliamentary commission in the canton Bern, before joining the Federal administration in 1983. She first worked for the federal office of education and science, and joined the Chancellery in 1987, leading the Chancellor's general secretariat since February 1988.