Nicolai Dubinin

Nicolai Gennadyevich Dubinin, (, ; born 27 May 1973) is a Russian Catholic prelate who has served as an auxiliary bishop for the Roman Catholic Archdiocese of Moscow since 2020. He has also served as apostolic administrator since 2026.

Life Dubinin was born in a family of intelligentsia as the younger among two children in the present day Southern Federal District. His paternal relatives were local Russian Orthodox while his maternal relatives were Roman Catholics in Byelorussian SSR. According to the Belarus rules for mixed unions, he had to be christened as Roman Catholic as a second child in a family. Nevertheless, he was "unfairly" christened in the Moscow Patriarchate just like his older sister. By his own admission, “he became a member of the Catholic Church as soon as the opportunity arose, in 1991, at the age of 18”.

After graduation of the school education, joined Faculty of Philology at the Rostov State University (1990–1993), but subsequently entered to the Order of Friars Minor Conventual in 1994;

On July 30, 2020, he was appointed by the Pope Francis as an Auxiliary Bishop of the Roman Catholic Archdiocese of Mother of God at Moscow and Titular Bishop of Aquae in Byzacena. On October 4, 2020, he was consecrated as bishop by Metropolitan Archbishop Paolo Pezzi and other prelates of the Roman Catholic Church in the Cathedral of the Immaculate Conception in Moscow.