Agustín Roberto Radrizzani, SDB (born September 22, 1944) is an Argentine prelate of the Roman Catholic Church. He currently serves as Archbishop of Mercedes-Luján.
Radrizzani made his profession as a member of the Salesians of Don Bosco on January 5, 1968, and was ordained to the priesthood on March 25, 1972.
On May 14, 1991, he was appointed Bishop of Neuquén by Pope John Paul II. Radrizzani received his episcopal consecration on the following July 20 from Bishop Argimiro Moure Piñeiro, SDB, with Bishops Jaime de Nevares, SDB, and Jorge Meinvielle, SDB, serving as co-consecrators. He was installed as Neuquén's ordinary on August 17 of that same year.
He was later named Bishop of Lomas de Zamora on April 24, 2001, being installed on the following June 23. After six years in the diocese, he was promoted by Pope Benedict XVI to Archbishop of Mercedes-Luján on December 27, 2007. Radrizzani is the first Salesian and member of any Roman Catholic religious institute to serve as Archbishop of that see.