Louis Dicaire (born 29 August 1946) is a Canadian Roman Catholic bishop. He is the auxiliary bishop of Saint-Jean-Longueuil.
Born in Montreal, Dicaire was educated at the Collège André-Grasset and Collège Saint-Jean-Vianney. He obtained his Bachelor's degree in Theology in 1973 and was ordained a priest on 20 January 1974. He went on to earn his master's degree in Pastoral Care at the Université de Sherbrooke in 1983.
From 1983 to 1985, Dicaire went to Rome, Italy, where he studied dogmatic theology and sacramental theology at the Pontifical Gregorian University and the Pontifical Atheneum of St. Anselm. He exercised his ministry in various parishes: Blessed John XXIII, Purification of the Blessed Virgin Mary, St. Colette and St. Joseph of Mont-Royal.
Dicaire served as chaplain to the Mount Royal Scouts and Guides, episcopal secretary and was named a Chaplain of His Holiness by the Holy See. From 1996 to 1999 he was episcopal vicar for the region of East Montreal. In 1999, he was appointed Auxiliary Bishop of Montreal and Titular Bishop of Thizica, for which office he was consecrated on 25 March, by Cardinal Jean-Claude Turcotte. Until 2002, he was responsible for the parish facilities.