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The Most Reverend Pierre Nguyễn Văn Viên
Auxiliary Bishop of Vinh Titular Bishop of Megalopolis in Proconsulari
Bishop Viên in a portrait with Bishop Long, 2023
Native name	Phêrô Nguyễn Văn Viên
Province	Hà Nội
Diocese	Vinh
See	Megalopolis in Proconsulari (titular)
Appointed	15 June 2013
Installed	4 September 2013
Previous post(s)	Apostolic Administrator of Hưng Hóa (2020-2022)
Orders
Ordination	3 October 1999
Consecration	4 September 2013 by Paul Nguyễn Thái Hợp OP, Joseph Nguyễn Năng, Michael Joseph McKenna
Personal details
Born	(1965-01-08) 8 January 1965 (age 59) Quảng Bình province, Vietnam
Denomination	Catholic
Alma mater	Vinh Thanh Major Seminary Catholic College of Education Sydney
Motto	Pacem Meam do vobis (My peace I give unto you) (Thầy ban cho anh em bình an của Thầy)
Coat of arms

Pierre Nguyễn Văn Viên is a Vietnamese Roman Catholic prelate, serving as Auxiliary Bishop of the Roman Catholic Diocese of Vinh,^[1] Titular Bishop of the Megalopolis in Proconsulari (Titular See) and Apostolic Administrator of the Roman Catholic Diocese of Hưng Hóa, Vietnam.^[2][3][4]

Nguyen was born in Quảng Bình province, Vietnam on 8 January 1965.^[2] He served in the army as a mandatory service. He acquired a doctorate in economics from the University of Agronomy, Hue.^[3]

On 3 October 1999, Nguyen was ordained a priest.^[2] After ordination, he worked in Australia among Vietnamese immigrants. He acquired his doctorate in theology in Australia.^[3]

Nguyen was appointed Auxiliary Bishop of the Roman Catholic Diocese of Vinh and Titular Bishop of the Megalopolis in Proconsulari (Titular See) on 15 June 2013 and consecrated as a bishop on 4 September 2013 by Bishop Paul Nguyễn Thái Hợp.^[3] He was appointed Apostolic Administrator of the Roman Catholic Diocese of Hưng Hóa on 29 August 2020 ^[2]