Nassif A. Ghoussoub OC FRSC is a Canadian mathematician working in the fields of non-linear analysis and partial differential equations.

[4] He was vice-president of the Canadian Mathematical Society from 1994 to 1996, the founding director of the Pacific Institute for the Mathematical Sciences (PIMS) for the period 1996–2003, the co-editor-in-chief of the Canadian Journal of Mathematics during 1993–2002, a co-founder of the MITACS Network of Centres of Excellence, and is the founder and scientific director (2001 - 2020) of the Banff International Research Station (BIRS).

He holds honorary doctorates from the Université Paris-Dauphine (France), and the University of Victoria (Canada).

He was awarded the Queen Elizabeth II Diamond Jubilee Medal in 2012, and appointed to the Order of Canada in 2015, with the grade of officer for contributions to mathematics, research, and education.

[2][6] In 2018, Ghoussoub was elected a faculty representative on the University of British Columbia's Board of Governors.