Paul Lacoste, OC (April 24, 1923 – August 22, 2009) was a Canadian lawyer, professor, and academic administrator.
Born in Montreal, Quebec, he received a Bachelor of Arts degree in 1943 and a Master of Arts degree in 1946 from the Université de Montréal.
In 1960, he received his Bachelor of Civil Law from Université de Montréal.
He joined the faculty of the Université de Montréal in 1946 and taught philosophy until 1986.
In 1977, he was made an Officer of the Order of Canada "in recognition of his many contributions as an administrator in education and public affairs".