Brian Joseph Dunn (born 1955) is a Canadian prelate of the Catholic Church who is Archbishop of Halifax-Yarmouth.

On 16 July 2008, Pope Benedict XVI named Dunn auxiliary bishop of the Diocese of Sault Sainte Marie.

[1] He received his episcopal consecration from Bishop Jean-Louis Plouffe at Cathedral of the Immaculate Conception in Grand Falls, Newfoundland and Labrador on 9 October.

Dunn was elected to participate in the 13th Ordinary General Assembly of the Synod of Bishops on the New Evangelization in October 2012.

He proposed "the appointment of pastoral teams consisting of clergy and laity, an official reflection on and recognition of lay ecclesial ministers, a deliberate and systematic involvement and leadership of women at all levels of Church life, e.g., permitting women to be instituted as lectors and acolytes and the institution of the ministry of catechist".