Ambrogio Fasoli (born 10 November 1964 in Milan) is a researcher and professor working in the field of fusion and plasma physics.

Since 1 January 2019, he chairs the European consortium EUROfusion, the umbrella organisation for the development of nuclear fusion power in Europe.

He joined the Physics Department of the Massachusetts Institute of Technology (MIT) as tenure track assistant professor in 1997.

In 2007, he was appointed executive director of the Centre de Recherches en Physique des Plasmas (CRPP), of which he became director in 2013, and which became the Swiss Plasma Center in 2015[5] Fasoli was responsible for several years for EPFL's TCV Tokamak, one of the national facilities in Europe participating in the research for the international reactor ITER[6] In 2008, Fasoli was elected as a Fellow of the American Physical Society.

He has developed a Massive open online course (MOOC) dedicated to fusion and plasma physics, with several thousand registrations each year.