Carlos José Ñáñez (born August 9, 1946) is an Argentinian prelate of the Roman Catholic Church.

He served as Auxiliary Bishop of Córdoba from 1990 to 1995 when he was appointed Archbishop Coadjutor of Tucumán.

Ñáñez received his episcopal consecration on January 24, 1991, from Cardinal Raúl Francisco Primatesta, Archbishop of Córdoba, with the Apostolic Nuncio to Argentina, Archbishop Ubaldo Calabresi, and the Bishop of Río Cuarto, Adolfo Roque Esteban Arana, as co-consecrators.

On December 20, 1995, he was appointed Archbishop Coadjutor of Tucumán, where he was installed on February 2, 1996.

On July 22, 2014, Pope Francis appointed Ñáñez to a five-year renewable term as a member of the Pontifical Council for Promoting Christian Unity.