Joseph Jacques Albert Grenier (born 31 August 1939, in Shawinigan) is a Canadian pianist, academic, and university administrator.
From 1979–1998 he was director of the Conservatoire de musique du Québec à Montréal (CMM).
In 1960 he was given honourable mention at the Maria Canals International Music Competition in Spain.
From 1962–1964 he was a pupil in the graduate program at the Badische Hochschule für Musik in Karlsruhe where he studied under Yvonne Loriod and earned a Master of Music degree in 1964.
While teaching at the UM he also earned a doctorate from that school in 1971 with his dissertation entitled 'Sonate pour deux pianos de Bruce Mather.