Charles-Auguste-Marie-Joseph, Count of Forbin-Janson, C.P.M., was a French aristocrat and prelate who was a founder of the Fathers of Mercy, established in an effort to re-evangelize the French people. He preached throughout North America, taking an active role in reviving the Catholic populations of the United States and Canada. He was influential in establishing an ultramontane stand in the Catholic Church in French-speaking Canada, an influence which would last for generations.

The Fathers of Mercy, formally known as the Congregation of the Priests of Mercy, is a Catholic religious congregation of pontifical right of missionary priests founded by Jean-Baptiste Rauzan in early 19th-century France.