Pierre Legendre CM FRSC OQ (born 5 October 1946), is a professor of ecology at Université de Montréal.

Pierre Legendre obtained an MSc in zoology from McGill University in 1969, and at age 24, he earned a PhD in evolutionary biology from the University of Colorado in 1971.

From 1971 to 1972, he worked as a postdoctoral fellow at Lund University.

From 1972 to 1980, he was employed at Université du Québec à Montréal.

As of October 2021, Legendre had published 12 books and over 340 scientific papers.