H. Reuben Cohen, CC, QC (born July 11, 1921) is a Canadian businessman, lawyer, and the third Chancellor of Dalhousie University. Born in Moncton, New Brunswick, he received a Bachelor of Arts degree from Dalhousie University in 1942 and a Bachelor of Law degree from the Dalhousie Law School in 1944. He started a law practice in Moncton in 1945 and was created a Queen's Counsel in 1968.