Auguste-René-Marie Dubourg (1 October 1842—22 September 1921)[1] was a French Cardinal of the Roman Catholic Church.

Auguste Dubourg was born in Loguivy-Plougrasto two inn-keepers[2] and studied at the seminary in Saint-Brieuc before being ordained to the priesthood on 22 December 1866.

On 19 January 1893, Dubourg was appointed Bishop of Moulins by Pope Leo XIII.

He received his episcopal consecration on the following 16 April from Bishop Pierre-Marie-Frédéric Fallières, with Bishops François-Marie Trégaro and Etienne-Marie Potron, OFM, serving as co-consecrators, in Saint-Brieuc Cathedral.

[3] Pope Benedict XV created him Cardinal Priest of S. Balbina in the consistory of 4 December 1916.